{"id":5743,"date":"2020-01-13T16:16:48","date_gmt":"2020-01-13T08:16:48","guid":{"rendered":"https:\/\/luvecg.cn\/?p=5743"},"modified":"2020-01-13T16:16:55","modified_gmt":"2020-01-13T08:16:55","slug":"%e6%91%84%e5%bd%b1%e7%9a%84%e7%ad%89%e6%95%88%e6%80%a7%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/picvlog.com\/?p=5743","title":{"rendered":"\u6444\u5f71\u7684\u7b49\u6548\u6027\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u6444\u5f71\u7684\u7b49\u6548\u6027\u662f\u4ec0\u4e48\uff1f<\/h1>\n\n\n\n<p>\u5982\u679c\u6709\u4eba\u8bf4\u201c 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class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/alexander-andrews-apsc-sensor.jpg\" alt=\"\u76f8\u673a\u4f20\u611f\u5668\u7684\u7279\u5199\" class=\"wp-image-236185\" title=\"%title\u63d2\u56fe%num\" \/><figcaption>\u4e9a\u5386\u5c71\u5927\u00b7\u5b89\u5fb7\u9c81\u65af\uff08Alexander Andrews\uff09\u7740\u300a Unsplash\u300b<\/figcaption><\/figure>\n\n\n\n<h2 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class=\"wp-block-heading\">\u6444\u5f71\u673a\u6761\u6b3e<\/h3>\n\n\n\n<p><strong>\u683c\u5f0f\u00a0<\/strong>\u662f\u6307\u6807\u51c6\u4f20\u611f\u5668\u5c3a\u5bf8\u3002\u6700\u5e38\u89c1\u7684\u662f\u5168\u753b\u5e45\uff0cAPS-C\u548c\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u683c\u5f0f\u76f8\u673a\u3002\u8fd8\u6709\u4e00\u4e9b\u8f83\u5c0f\u7684\u624b\u673a\u548c\u4fbf\u643a\u5f0f\u76f8\u673a\u3002<\/p>\n\n\n\n<p><strong>\u4f20\u611f\u5668\u5c3a\u5bf8\u3002&nbsp;<\/strong>\u4efb\u4f55\u4f20\u611f\u5668\u7684\u9762\u79ef\uff0c\u7531\u5176\u8fb9\u957f\u7ed9\u51fa\u3002\u5168\u753b\u5e45\u4f20\u611f\u5668\u7684\u5c3a\u5bf8\u4e3a36mm x 24mm\u3002<\/p>\n\n\n\n<p><strong>\u4f20\u611f\u5668\u5bf9\u89d2\u7ebf\u3002\u00a0<\/strong>\u4f20\u611f\u5668\u5bf9\u89d2\u7ebf\u7684\u957f\u5ea6\u7528\u4e8e\u8ba1\u7b97\u88c1\u526a\u56e0\u5b50\u3002\u53ef\u4ee5\u7528\u52fe\u80a1\u5b9a\u7406\u4ece\u4e24\u4fa7\u76f4\u63a5\u8ba1\u7b97\u51fa\u3002<\/p>\n\n\n\n<p><strong>\u4f20\u611f\u5668\u5e73\u9762\u3002&nbsp;<\/strong>\u4f20\u611f\u5668\u6216\u80f6\u7247\u5728\u76f8\u673a\u5185\u7684\u5e73\u9762\u3002\u60a8\u53ef\u4ee5\u5728\u76f8\u673a\u7684\u2205\u7b26\u53f7\u5904\u627e\u5230\u5b83\u3002<\/p>\n\n\n\n<p><strong>\u4f5c\u7269\u56e0\u5b50\u3002&nbsp;<\/strong><em>\u5168\u5e27\u5bf9\u89d2\u7ebf<\/em>\u4e0e\u4efb\u4f55\u7ed9\u5b9a\u683c\u5f0f\u7684\u4f20\u611f\u5668<em>\u5bf9\u89d2\u7ebf<\/em>\u7684\u6bd4\u7387\u3002<\/p>\n\n\n\n<p><strong>\u50cf\u7d20&nbsp;<\/strong>\u5c0f\u578b\u7684\u5149\u654f\u63a2\u6d4b\u5668\u3002\u50cf\u7d20\u662f\u5f71\u54cd\u56fe\u50cf\u6570\u636e\u7684\u6700\u5c0f\u6210\u5206\u3002\u76f8\u673a\u4f20\u611f\u5668\u4e0a\u6709\u6570\u4ee5\u767e\u4e07\u8ba1\u7684\u56fe\u50cf\uff0c\u5b83\u4eec\u53ef\u4ee5\u751f\u6210\u56fe\u50cf\u3002<\/p>\n\n\n\n<p><strong>\u50cf\u7d20\u6570\u3002&nbsp;<\/strong>\u5728\u4f20\u611f\u5668\u4e0a\u627e\u5230\u7684\u50cf\u7d20\u6570\u3002\u901a\u5e38\u4ee5\u5146\u50cf\u7d20\u4e3a\u5355\u4f4d\uff0c<strong>MP\u4e3a<\/strong>&nbsp;1,000,000\u50cf\u7d20\u3002<\/p>\n\n\n\n<p><strong>\u50cf\u7d20\u5927\u5c0f\u3002\u00a0<\/strong>\u5355\u4e2a\u50cf\u7d20\u7684\u7269\u7406\u5c3a\u5bf8\u3002\u5b83\u662f\u4e00\u4fa7\u7684\u957f\u5ea6\uff0c\u4ee5\u5fae\u7c73\u4e3a\u5355\u4f4d\uff0c<strong>\u03bcms<\/strong>\u3002\u50cf\u7d20\u8d8a\u5927\uff0c\u5b83\u53ef\u4ee5\u6536\u96c6\u7684\u5149\u5c31\u8d8a\u591a-\u00a0\u901a\u5e38\u53ef\u4ee5\u964d\u4f4e\u566a\u58f0\u3002<\/p>\n\n\n\n<p><strong>ISO\u3002<\/strong>\u901a\u5e38\u79f0\u4e3a\u201c\u654f\u611f\u6027\u201d\uff0c\u53ea\u6709\u4e00\u534a\u662f\u6b63\u786e\u7684\u3002\u8be5\u8bbe\u7f6e\u586b\u8865\u4e86\u4e0d\u540c\u683c\u5f0f\u548c\u50cf\u7d20\u5927\u5c0f\u4e4b\u95f4\u7684\u66dd\u5149\u4e0d\u4e00\u81f4\u3002\u6211\u4eec\u5c06\u5bf9\u5176\u8fdb\u884c\u8be6\u7ec6\u7814\u7a76\u3002<\/p>\n\n\n\n<p><strong>\u4fe1\u566a\u6bd4\uff08SNR\uff09<\/strong>\u662f\u56fe\u50cf\u4e0a\u6709\u4ef7\u503c\u7684\u5149\u4fe1\u606f\uff08\u4fe1\u53f7\uff09\u4e0e\u968f\u673a\u4fe1\u606f\uff08\u566a\u58f0\uff09\u7684\u6bd4\u7387\u3002\u5149\u8d8a\u5c11\uff0c\u4fe1\u566a\u6bd4\u5c31\u8d8a\u4f4e\uff0c\u56e0\u6b64\u566a\u58f0\u4e5f\u5c31\u8d8a\u5927\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u955c\u5934\u6761\u6b3e<\/h3>\n\n\n\n<p><strong>\u7126\u8ddd\u3002<\/strong>\u955c\u7247\u7684\u7269\u7406\u6027\u8d28\uff0c\u4ee5<strong>\u6beb\u7c73\u4e3a\u5355\u4f4d<\/strong>\u3002\u5b83\u4e0e\u955c\u5934\u7684<em>\u89c6\u89d2<\/em>\u6210\u53cd\u6bd4-\u4f46\u662f\uff0c\u5b83\u5e76\u4e0d\u80fd\u81ea\u884c\u786e\u5b9a\u3002<\/p>\n\n\n\n<p><strong>\u89c6\u89d2\u3002<\/strong>\u7f29\u5199\u4e3aAoV\u3002\u7ed9\u5b9a<em>\u683c\u5f0f&nbsp;<\/em>\u7684<em>\u7126\u8ddd<\/em>\u4ea7\u751f\u7684\u89d2\u5ea6\uff08\u5782\u76f4\uff0c\u6c34\u5e73\u6216\u5bf9\u89d2\u7ebf\uff09\u3002\u89c6\u573a\uff08FoV\uff09\u975e\u5e38\u76f8\u4f3c\u3002\u5b83\u4eec\u53ef\u4ee5\u4e92\u6362\u4f7f\u7528\u3002<em><\/em><\/p>\n\n\n\n<p><strong>\u666f\u6df1\u3002<\/strong>\u7f29\u5199\u4e3aDoF\uff0c\u662f\u6307\u53ef\u63a5\u53d7\u7126\u70b9\u7684\u533a\u57df\uff08\u6df1\u5ea6\uff09\u3002\u5b83<em><strong>\u4ec5<\/strong><\/em>\u7531<em>\u62cd\u6444\u8ddd\u79bb<\/em>\u548c\u00a0\u00a0<em>\u5149\u5708\u5927\u5c0f<\/em>\u51b3\u5b9a<em>\u3002\u00a0<\/em>\u7126\u8ddd\u6216\u4f20\u611f\u5668\u5c3a\u5bf8\u4e0d\u4f1a\u5f71\u54cd\u666f\u6df1\u3002<\/p>\n\n\n\n<p><strong>\u6295\u5f71\u3002&nbsp;<\/strong>\u955c\u5934\u56fe\u50cf\u8986\u76d6\u5728\u80f6\u7247\u6216\u4f20\u611f\u5668\u5e73\u9762\u4e0a\u7684\u533a\u57df\u3002<\/p>\n\n\n\n<p><strong>\u6536\u655b\u70b9\u3002&nbsp;<\/strong>\u900f\u955c\u4e2d\u6240\u6709\u805a\u7126\u7684\u5165\u5c04\u5149\u4f1a\u805a\u6210\u4e00\u4e2a\u70b9\u7684\u70b9\u3002\u901a\u5e38\u662f\u8679\u819c\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<p><strong>\u8679\u819c\/\u819c\u7247\u3002<\/strong>\u900f\u955c\u7684\u673a\u68b0\u90e8\u5206\uff0c\u4f4d\u4e8e\u4f1a\u805a\u70b9\u9644\u8fd1\u3002\u5b83\u7f29\u5c0f\u6216\u6269\u5927\u4e86\u5149\u5708\u7684\u5927\u5c0f\u3002\u6709\u65f6\u79f0\u4e3a<em>\u5149\u5708<\/em>\uff0c\u9002\u5408\u65e5\u5e38\u4f7f\u7528\uff0c\u4f46\u4e0d\u9002\u7528\u4e8e\u6b64\u5904\u3002<\/p>\n\n\n\n<p><strong>\u5149\u5708\u3002&nbsp;<\/strong>\u4f1a\u805a\u70b9\u5904\u7684\u955c\u7247\u5f00\u53e3\u3002<\/p>\n\n\n\n<p><strong>\u5149\u5708\u5927\u5c0f\u3002<\/strong>\u7531\u4e8e\u5b54\u662f\u5706\u5f62\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5176\u76f4\u5f84\uff08\u4ee5<strong>\u6beb\u7c73\u4e3a\u5355\u4f4d\uff09<\/strong>\u7ed9\u51fa\u5c3a\u5bf8\uff0c\u8fd9\u662f\u8ba1\u7b97\u7b49\u6548\u6027\u65f6\u7684\u5173\u952e\u56e0\u7d20\u3002<\/p>\n\n\n\n<p><strong>\u76f8\u5bf9\u5149\u5708\u3002&nbsp;<\/strong>\u7126\u8ddd\u4e0e\u5149\u5708\u5927\u5c0f\u4e4b\u6bd4\u3002\u901a\u5e38\u4ee5<strong>f<\/strong>\u6863\u7ed9\u51fa&nbsp;&nbsp;<strong>\u3002&nbsp;<\/strong>\u66b4\u9732\u7684\u91cd\u8981\u90e8\u5206\u3002<\/p>\n\n\n\n<p><strong>\u505c\u6b62\u3002\u00a0<\/strong>\u901a\u8fc7\u5b9e\u9645\u7684\u900f\u5149\u7387\u6bd4\u7387\u6821\u6b63f\u6863\u3002T-Stop\u53ef\u51c6\u786e\u6d4b\u91cf\u901a\u8fc7\u955c\u5934\u7684\u5149\u3002<\/p>\n\n\n\n<p><strong>\u6cd5\u5170\u8ddd\u79bb\u3002&nbsp;<\/strong>\u76f8\u673a\u7cfb\u7edf\u4e2d\u4ece\u4f20\u611f\u5668\u5230\u955c\u5934\u5ea7\u7684\u8ddd\u79bb\u3002<\/p>\n\n\n\n<p><strong>\u8986\u76d6\u8303\u56f4\u3002&nbsp;<\/strong>\u6765\u81ea\u955c\u5934\u7684\u6295\u5f71\u5706\u7684\u5927\u5c0f\u3002\u5728\u4f20\u611f\u5668\u5e73\u9762\u4e0a\u6d4b\u91cf\u3002\u5b83\u4f1a\u544a\u8bc9\u60a8\u955c\u5934\u662f\u5426\u8986\u76d6\u683c\u5f0f\uff0c\u6216\u8005\u60a8\u5e94\u8be5\u770b\u5230\u9ed1\u89d2\u3002<\/p>\n\n\n\n<p><strong>\u683c\u5f0f\u3002&nbsp;<\/strong>\u7ed9\u5b9a\u955c\u5934\u8bbe\u8ba1\u7684\u4f20\u611f\u5668\u683c\u5f0f\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-projection.jpg\" alt=\"\u8be5\u56fe\u89e3\u91ca\u4e86\u955c\u5934\u6295\u5f71\u7684\u5de5\u4f5c\u539f\u7406\" class=\"wp-image-237967\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<p><strong>\u89e3\u6790\u5ea6\u3002\u00a0<\/strong>\u955c\u5934\u7684\u5149\u5b66\u8d28\u91cf\u65b9\u9762\u3002\u901a\u8fc7\u5c06\u955c\u5934\u4e0eMTF\u56fe\u8868\u663e\u793a\u7684\u201c\u5b8c\u7f8e\u955c\u5934\u201d\u8fdb\u884c\u6bd4\u8f83\u6765\u6d4b\u91cf\u3002\u5b83\u6307\u7684\u662f\u955c\u5934\u7684\u6e05\u6670\u5ea6\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5168\u5e27\u6807\u51c6\u7684\u91cd\u8981\u6027<\/h2>\n\n\n\n<p>\u90a3\u4e48\uff0c\u4e3a\u4ec0\u4e48\u5c06\u6240\u6709\u5185\u5bb9\u4e0e\u5168\u753b\u5e45\u8fdb\u884c\u6bd4\u8f83\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u9700\u8981\u8fd9\u6837\u505a\u5462\uff1f<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u95ee\u9898\u6709\u591a\u4e2a\u7b54\u6848\u3002<\/p>\n\n\n\n<p>\u5728\u4e0a\u4e2a\u4e16\u7eaa\uff0c35mm\u80f6\u7247\u662f\u6700\u53d7\u6b22\u8fce\u7684\u683c\u5f0f\u3002\u8fd9\u79cd\u683c\u5f0f\u4ee3\u8868\u4e86\u4f4e\u4ef7\uff0c\u4fbf\u643a\u6027\uff0c\u56fe\u50cf\u8d28\u91cf\u548c\u6027\u80fd\u4e4b\u95f4\u7684\u5e73\u8861\u3002<\/p>\n\n\n\n<p>\u5927\u591a\u6570\u6444\u5f71\u5e08\u90fd\u719f\u608935mm\u80f6\u7247\u76f8\u673a\u4e0a\u7126\u8ddd\u7684\u201c\u5916\u89c2\u201d\u300220\u4e16\u7eaa\u521b\u4f5c\u7684\u51e0\u4e4e\u6240\u6709\u6444\u5f71\u6307\u5357\u548c\u4e66\u7c4d\u90fd\u4ee535mm\u4e3a\u57fa\u7840\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/35mm-full-frame.jpg\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/35mm-full-frame.jpg\"  class=\"wp-image-237331\" title=\"%title\u63d2\u56fe%num\" alt=\"%title\u63d2\u56fe%num\" \/><\/a><figcaption>35mm\u5168\u753b\u5e45\u2013\u7535\u5f71\u548c\u6570\u7801<\/figcaption><\/figure>\n\n\n\n<p>\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u955c\u5934\u9002\u5e94\u4e0d\u540c\u7684\u683c\u5f0f\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u9002\u914d\u5668\u5c06\u65e7\u768435mm\u80f6\u5377\u955c\u5934\u5b89\u88c5\u5230APS-C\u673a\u8eab\u4e0a\u3002\u6216\u8005\uff0c\u60a8\u53ef\u4ee5\u5728APS-C\u4f73\u80fdEF\u76f8\u673a\u4e0a\u4f7f\u7528\u5168\u753b\u5e45\u4f73\u80fdEF\u955c\u5934\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u9002\u5e94\u6027\u5e26\u6765\u4e86\u5bf9\u516c\u5171\u53c2\u8003\u70b9\u7684\u9700\u6c42\u3002<\/p>\n\n\n\n<p>\u5168\u753b\u5e45\uff08\u76f4\u5230\u6700\u8fd1\uff09\u662f\u6bcf\u5929\u6444\u5f71\u5e08\u90fd\u80fd\u8d1f\u62c5\u5f97\u8d77\u7684\u6700\u5927\u753b\u5e45\u3002<\/p>\n\n\n\n<p>\u9664\u9ad8\u7ea7\u4e13\u4e1a\u4eba\u5458\u5916\uff0c\u6240\u6709\u4eba\u90fd\u65e0\u6cd5\u4f7f\u7528\u4e2d\u7b49\u683c\u5f0f\u3002\u56e0\u6b64\uff0c\u4ee5\u5168\u753b\u5e45\u4f5c\u4e3a\u57fa\u51c6\u5f88\u6709\u610f\u4e49\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f5c\u7269\u56e0\u7d20<\/h2>\n\n\n\n<p>\u4f5c\u7269\u56e0\u7d20\u662f\u60a8\u4e4b\u524d\u4ece\u672a\u542c\u8bf4\u8fc7\u7684\u77ed\u8bed\u3002\u5b83\u6307\u7684\u662f\u7ed9\u5b9a\u4f20\u611f\u5668\u5c3a\u5bf8\u4e0e\u5168\u5e27\u5c3a\u5bf8\u4e4b\u6bd4\u3002\u5b83\u662f\u4f7f\u7528\u5bf9\u89d2\u7ebf\u8ba1\u7b97\u7684\u3002<\/p>\n\n\n\n<p>\u5f53\u4eca\u7684\u5927\u591a\u6570\u6570\u7801\u76f8\u673a\u90fd\u6ca1\u6709\u5168\u753b\u5e45\u4f20\u611f\u5668\u3002\u76f8\u53cd\uff0c\u5b83\u4eec\u5177\u6709\u66f4\u5c0f\uff0c\u66f4\u4fbf\u5b9c\u7684\u4f20\u611f\u5668\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e9b\u4f20\u611f\u5668\u662f\u60a8\u53ef\u4ee5\u4ece\u672c\u5730\u6280\u672f\u5546\u5e97\u7684\u8d27\u67b6\u4e0a\u62ff\u8d77\u7684\u6570\u7801\u5355\u53cd\u76f8\u673a\u548c\u65e0\u53cd\u5149\u955c\u76f8\u673a\u4e2d\u627e\u5230\u7684\u3002<\/p>\n\n\n\n<p>\u4e0e\u5168\u753b\u5e45\u76f8\u6bd4\uff0c\u5b83\u4eec\u8981\u5c0f\u5f97\u591a\u3002\u867d\u7136\u6709\u5e38\u89c1\u7684\u5c3a\u5bf8\u3002\u6700\u666e\u904d\u7684\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u7d27\u51d1\u578b\u76f8\u673a\u548c\u667a\u80fd\u624b\u673a\u5747\u4f7f\u7528\u5c3a\u5bf8\u5c0f\u4e8e13mm x 9mm\u7684\u4f20\u611f\u5668\u3002\u5b83\u4eec\u7684\u88c1\u526a\u7cfb\u6570\u57283\u500d\u81f38\u500d\u4e4b\u95f4\u53d8\u5316\u3002<\/li><li><strong>\u5fae\u578b\u56db\u5206\u4e4b\u4e09<\/strong>\uff08MFT\u6216M4 \/ 3\uff09\u2013\u8fd9\u4e5f\u662f\u76f8\u673a\u7cfb\u7edf\u7684\u540d\u79f0\u3002\u8fd9\u4e9b\u662f\u53ef\u4e92\u6362\u955c\u5934\u76f8\u673a\u4e2d\u6700\u5c0f\u7684\u4f20\u611f\u5668\uff0c\u5c3a\u5bf8\u4e3a17.3mm x 13mm\u3002\u5bf9\u89d2\u7ebf\u4e3a21.6mm\uff0c\u6b63\u597d\u662f\u5168\u753b\u5e45\u7684\u4e00\u534a\u3002\u56e0\u6b64\uff0c\u5b83\u7684\u88c1\u526a\u56e0\u5b50\u662f2\u500d\u3002\u957f\u5bbd\u6bd4\u4e0e\u5168\u5e27\u76843\uff1a2\u4e0d\u540c\uff1b\u800c\u662f4\uff1a3\u3002<\/li><li><strong>APS-C<\/strong>&nbsp;\u2013\u6bd4MFT\u5927\u3002\u5927\u5c0f\u4e0d\u6b63\u786e\u3002APS-C\u4f20\u611f\u5668\u7684\u5c3a\u5bf8\u572822x15mm\u81f325x19mm\u4e4b\u95f4\u3002\u5bbd\u9ad8\u6bd4\u4e3a3\uff1a2\uff0c\u4e0e\u5168\u5c4f\u76f8\u540c\u3002\u6b64\u5904\u7684\u4f5c\u7269\u7cfb\u6570\u662f1.5-1.7\u500d\u3002<\/li><li><strong>APS-H&nbsp;<\/strong>&nbsp;\u2013 29.2mm x 20.2mm\u5c3a\u5bf8\u7684\u683c\u5f0f\uff0c\u73b0\u5df2\u7edd\u8ff9\u3002\u5b83\u7684\u4f5c\u7269\u56e0\u5b50\u662f1.3\u500d\u3002APS-C\u548c\u5168\u753b\u5e45\u4f73\u80fd\u76f8\u673a<\/li><\/ul>\n\n\n\n<p>\u5982\u679c\u5c06\u8fd9\u4e9b\u4f20\u611f\u5668\u7684\u5bf9\u89d2\u7ebf\u4e0e43mm\u7684\u5168\u5e27\u5bf9\u89d2\u7ebf\u8fdb\u884c\u6bd4\u8f83\uff0c\u5219\u4f1a\u5f97\u5230<strong>\u88c1\u526a\u56e0\u5b50<\/strong>\u3002<\/p>\n\n\n\n<p>\u88c1\u526a\u56e0\u5b50\u4e3a\u5341\u8fdb\u5236\u5f62\u5f0f\u3002\u88c1\u526a1.6\u500d\u610f\u5473\u7740\u4f20\u611f\u5668\u6bd4\u5168\u753b\u5e45\u5c0f1.6\u500d\u30020.8x\u7684\u88c1\u526a\u610f\u5473\u7740\u4f20\u611f\u5668\u6bd4\u5168\u5e27\u59271 \/ 0.8\u3002<\/p>\n\n\n\n<p>\u5168\u5e27\u7684\u88c1\u526a\u56e0\u5b50\u4e3a1.0x\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f5c\u7269\u56e0\u5b50\u5bf9\u89c6\u91ce\u7684\u5f71\u54cd\uff08\u7126\u8ddd\uff09<\/h3>\n\n\n\n<p>\u4f5c\u7269\u56e0\u7d20\u544a\u8bc9\u6211\u4eec\u5f88\u591a\u4e8b\u60c5\u3002\u5b83\u6700\u660e\u663e\u7684\u5f71\u54cd\u662f\u89c6\u91ce\u7684\u53d8\u5316\u3002<\/p>\n\n\n\n<p>\u6444\u5f71\u955c\u5934\u7684\u6295\u5f71\u6709\u9650\u3002\u6295\u5f71\u662f\u4e00\u4e2a\u5706\u3002\u5b83\u7684\u5927\u5c0f\u4f1a\u6709\u6240\u4e0d\u540c\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u60a8\u8ddd\u79bb\u955c\u5934\u7684\u8ddd\u79bb\u3002\u6211\u4eec\u5728\u6210\u50cf\u5e73\u9762\u6216<strong>\u4f20\u611f\u5668\u5e73\u9762<\/strong>\u4e0a\u5bf9\u5176\u8fdb\u884c\u6d4b\u91cf\u3002<\/p>\n\n\n\n<p>\u76f8\u673a\u955c\u5934\u5728\u8bbe\u8ba1\u65f6\u4f1a\u8003\u8651\u7279\u5b9a\u7684\u683c\u5f0f\u3002\u5168\u753b\u5e45\u955c\u5934\u5fc5\u987b\u8986\u76d6\u5168\u753b\u5e45\u4f20\u611f\u5668\u7684\u5c3a\u5bf8\uff0c\u5e76\u4e14\u8981\u66f4\u5927\u4e00\u4e9b\uff08\u4ee5\u83b7\u5f97\u66f4\u597d\u7684\u8d28\u91cf\uff09\u3002\u56e0\u6b64\uff0c\u5b83\u7684\u6295\u5f71\u8bbe\u8ba1\u5f97\u8db3\u591f\u5bbd\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\uff0c\u5982\u679c\u6ca1\u6709\u5176\u4ed6\u969c\u788d\u7269\uff0c\u60a8\u4e5f\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06\u5168\u6846\u955c\u5934\u5b89\u88c5\u5728\u8f83\u5c0f\u7684\u4f20\u611f\u5668\u4e0a\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\u8be5\u955c\u5934\u7684\u884c\u4e3a\u4e0d\u4f1a\u50cf\u5168\u753b\u5e45\u76f8\u673a\u90a3\u6837\u3002\u8be5<strong>\u4f5c\u7269\u7684\u56e0\u7d20&nbsp;<\/strong>\u63a5\u8e35\u800c\u6765\u5176\u89c6\u91ce\u3002<\/p>\n\n\n\n<p>\u60a8\u6709\u53ef\u80fd\u4e00\u76f4\u5728\u8fd9\u6837\u505a\u3002\u6700\u53d7\u6b22\u8fce\u7684\u5b9a\u7126\u955c\u5934\uff0c\u6709\u00a0\u00a0\u4e94\u5341\u591a\u79cd\uff0850mm f \/ 1.8\uff09\u6db5\u76d6\u4e86\u5168\u753b\u5e45\u4f20\u611f\u5668\u3002\u5b83\u662f\u4e3a\u80f6\u7247\u76f8\u673a\u8bbe\u8ba1\u7684\u3002<\/p>\n\n\n\n<p>\u5f53\u60a8\u5c06\u5176\u5b89\u88c5\u5728\u8f83\u5c0f\u7684\u6570\u7801\u76f8\u673a\u4e0a\u65f6\uff0c\u5c31\u4e0d\u4f1a\u4f7f\u7528\u6574\u4e2a\u955c\u5934\uff01<\/p>\n\n\n\n<p>\u770b\u770b\u4e0d\u540c\u7684\u4f20\u611f\u5668\u5982\u4f55\u201c\u88c1\u526a\u201d\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/fov-crop.jpg\" alt=\"\u8be5\u56fe\u6bd4\u8f83\u4e86\u5168\u753b\u5e45\u955c\u5934\u4e0e\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u548c1.6\u500dAPS-C\u4f20\u611f\u5668\" class=\"wp-image-237568\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd9\u79cd\u4f5c\u7269\u56e0\u7d20\u5728\u73b0\u5b9e\u751f\u6d3b\u4e2d\u610f\u5473\u7740\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p>\u4f5c\u7269\u56e0\u7d20\u4e0d\u662f\u95ee\u9898\u3002\u60a8\u53ef\u4ee5\u5229\u7528\u4f5c\u7269\u56e0\u5b50\u7684\u5f71\u54cd\u6765\u6ee1\u8db3\u60a8\u7684\u9700\u6c42\u3002\u751a\u81f3\u53ef\u80fd\u5bfc\u81f4\u7279\u5b9a\u955c\u5934\u7684\u6e05\u6670\u5ea6\u589e\u52a0\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u6211\u7ecf\u5e38\u4f7f\u7528\u4f73\u80fdEF 24-105mm f \/ 4 IS\u955c\u5934\u3002\u8fd9\u662f\u4e00\u4e2a\u950b\u5229\u7684\u955c\u5934\u3002\u4f46\u662f\u5b83\u5bf9\u50cf\u89d2\u6709\u5f88\u5f3a\u7684\u7403\u5dee\uff0c\u4ece\u800c\u5bfc\u81f4\u8fd9\u4e9b\u533a\u57df\u6a21\u7cca\u3002<\/p>\n\n\n\n<p>\u5f53\u6211\u5c06\u955c\u5934\u5b89\u88c5\u5728\u88c1\u526a\u4f20\u611f\u5668\u76f8\u673a\u4e0a\u65f6\uff0c\u90a3\u4e9b\u89d2\u88ab\u88c1\u526a\u6389\u4e86\u3002\u56e0\u6b64\uff0c\u56fe\u50cf\u7684\u6574\u4f53\u6e05\u6670\u5ea6<em>\u66f4\u597d<\/em>\u3002<\/p>\n\n\n\n<p>\u8fd9\u662f\u60a8\u6700\u5bb9\u6613\u7406\u89e3\u89c6\u573a\u7684\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<p>\u8fdc\u6444\u6548\u679c\u5f97\u5230\u4e86\u589e\u5f3a\u2013\u5728\u8f83\u5c0f\u7684\u4f20\u611f\u5668\u4e0a\uff0c\u8fdc\u6444\u955c\u5934\u7684\u8fdc\u6444\u6548\u679c\u751a\u81f3\u66f4\u9ad8\u3002<\/p>\n\n\n\n<p>\u53e6\u4e00\u9762\u4e5f\u6709\u6548\u3002\u7532\u5e7f\u89d2\u955c\u5934\u8bbe\u8ba1\u7528\u4e8e\u5168\u5e27\uff08\u6bd4\u5982\u8bf4\uff0c24mm\u7684F \/ 1.4\uff09\u5c06\u5bfb\u627e\u4e00\u4e2a\u4f5c\u7269\u76f8\u673a\u4e0a\u66f4\u7d27\u3002<\/p>\n\n\n\n<p>\u9009\u62e9\u955c\u7247\u65f6\u8bf7\u8bb0\u4f4f\u8fd9\u4e00\u70b9\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5c06\u955c\u5934\u7684<strong>\u5b9e\u9645\u7126\u8ddd<\/strong>\u4e58\u4ee5<strong>\u88c1\u5207\u56e0\u6570<\/strong>\uff0c\u5219\u4f1a\u5f97\u5230<strong>\u7b49\u6548\u7684\u7126\u8ddd\u3002&nbsp;<\/strong>\u5b83\u663e\u793a\u4e86\u4ec0\u4e48\u7126\u8ddd\u53ef\u4ee5\u5728\u5168\u753b\u5e45\u76f8\u673a\u4e0a\u63d0\u4f9b\u76f8\u540c\u7684\u89c6\u91ce\u3002<\/p>\n\n\n\n<p>\u8bf7\u8bb0\u4f4f\uff0c\u7126\u8ddd<em>\u53ea\u662f<\/em>\u955c\u5934\u7684\u5c5e\u6027\u3002\u56e0\u6b64\uff0c\u4e3a\u4f5c\u7269\u4f20\u611f\u5668\u8bbe\u8ba1\u7684\u955c\u5934\u6807\u6709\u5176\u5b9e\u9645\u7126\u8ddd\uff0c\u800c\u4e0d\u662f\u7b49\u6548\u7126\u8ddd\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-crop-fov-effect-full.jpg\" alt=\"\u4fe1\u606f\u56fe\u89e3\u91ca\u4f5c\u7269\u4f20\u611f\u5668\" class=\"wp-image-237673\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<p>18-55mm\u5957\u88c5\u955c\u5934\u662f\u4e3aAPS-C\u76f8\u673a\u8bbe\u8ba1\u7684\u3002APS-C\u7684\u4ea7\u91cf\u7ea6\u4e3a1.6\u500d\u3002\u56e0\u6b64\uff0c\u8be5\u7ec4\u5408\u63d0\u4f9b\u4e86\u4e0e28-90mm\u955c\u5934\u5168\u753b\u5e45\u76f8\u540c\u7684\u89c6\u56fe\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u4f5c\u7269\u56e0\u5b50\u5bf9\u89c6\u573a\u7684\u5f71\u54cd\u4e0d\u662f\u597d\u662f\u574f\uff0c\u4f46\u5fc5\u987b\u8981\u770b\u5230\u5b83\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f5c\u7269\u56e0\u5b50\u5bf9\u5b54\u5f84\u7684\u5f71\u54cd<\/h3>\n\n\n\n<p>\u5982\u60a8\u5148\u524d\u6240\u89c1\uff0c\u6211\u4eec\u5fc5\u987b\u5728\u76f8\u5bf9\u5149\u5708\u548c\u5149\u5708\u5927\u5c0f\u4e4b\u95f4\u505a\u51fa\u4e25\u683c\u7684\u533a\u5206\u3002<\/p>\n\n\n\n<p>\u76f8\u5bf9\u5149\u5708\u662f\u60a8\u6bcf\u5929\u4f7f\u7528\u7684\u5149\u5708\u3002\u8fd9\u662f\u63a5\u89e6\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002\u8fd9\u662f\u76f8\u5bf9\u7684\uff0c\u56e0\u4e3a\u5b83\u662f<em>\u7126\u8ddd&nbsp;<\/em>\u4e0e&nbsp;&nbsp;<em>\u5149\u5708\u5927\u5c0f<\/em>\u7684\u6bd4\u7387\u3002<\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/expertphotography.com\/narrow-vs-wide-aperture\/\" target=\"_blank\"><\/a>\u53e6\u4e00\u65b9\u9762\uff0c\u5b54\u5f84\u5927\u5c0f\u662f\u6307\u5b54\u5f84\u7684\u7269\u7406\u5927\u5c0f\u3002<\/p>\n\n\n\n<p>\u7528\u76f4\u5f84\u8868\u793a\u3002\u4ece\u8fd9\u4e00\u70b9\uff0c\u6211\u4eec\u53ef\u4ee5\u8ba1\u7b97\u51fa\u7684\u5b9e\u9645\u9762\u79ef\uff0c\u4f7f\u7528\u03c0R&nbsp;<sup>2<\/sup>\u516c\u5f0f\u3002\u76f4\u5f84\u662f\u534a\u5f84\u7684\u4e24\u500d\uff0c\u6240\u4ee5\u9762\u79ef\u662f\u03c0\uff08d \/ 2\uff09<sup>2<\/sup>\u3002<\/p>\n\n\n\n<p>\u6b64\u8ba1\u7b97\u8868\u660e\uff0c<strong>\u5149\u5708<\/strong>\u786e\u5b9e<strong>\u53d7\u88c1\u526a\u56e0\u5b50<\/strong>\uff08\u4e8c\u8005\u7684\u5e42\uff09\u5f71\u54cd\u3002\u8ba9\u6211\u89e3\u91ca\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"action-menu\">\u4f5c\u7269\u56e0\u7d20\u80cc\u540e\u7684\u7269\u7406\u5b66<\/h3>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-1.8-lenses.jpg\" alt=\"\u5965\u6797\u5df4\u65af25mm f \/ 1.8\u955c\u5934\u548c\u4f73\u80fd50mm f \/ 1.8\u955c\u5934\" class=\"wp-image-237745\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<p>\u6211\u4eec\u6709\u4e24\u4e2a\u955c\u5934\u300225mm f \/ 1.8\u662f\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u76f8\u673a\u7684\u6d41\u884c\u9009\u62e9\u300250mm f \/ 1.8\u955c\u5934\u901a\u5e38\u662f\u5168\u753b\u5e45\u76f8\u673a\u7684\u9996\u9009\u3002<\/p>\n\n\n\n<p>25mm f \/ 1.8\u7684\u5b54\u5f84\u4e3a<em>14mm<\/em>\uff0c\u800c50mm f \/ 1.8\u7684\u5b54\u5f84\u4e3a<em>28mm<\/em>\u3002\u4e0e50mm\u955c\u5934\u76f8\u6bd4\uff0c25mm\u955c\u5934<strong>\u7684\u5149\u5708\u5927\u5c0f<\/strong>\u4e3af \/ 1.8&nbsp;<strong>\u7684\u56db\u5206\u4e4b\u4e00<\/strong>\u3002<\/p>\n\n\n\n<p>\u4ed6\u4eec\u4ecd\u7136\u8ba9\u76f8\u540c\u6570\u91cf\u7684\u5149\u901a\u8fc7\u3002\u4f46\u662f\uff0c\u8fd925\u6beb\u7c73\u7684\u5149\u7ebf\u4ece<strong>\u56db\u500d\u4e8e\u66f4\u5927\u7684\u533a\u57df\u4f1a<\/strong>\u805a\u5149\u3002<\/p>\n\n\n\n<p>\u8ba9\u6211\u4eec\u5c06\u5b83\u4eec\u5b89\u88c5\u5728M4 \/ 3\u548c\u5168\u753b\u5e45\u76f8\u673a\u4e0a\uff0c\u4ee5\u83b7\u5f97\u76f8\u4f3c\u7684\u89c6\u91ce\u3002<\/p>\n\n\n\n<p>\u4ee52\u500d\u7684\u88c1\u5207\u7387\uff0c\u60a8\u5c06<strong>\u88c1\u5207\u51fa<\/strong>&nbsp;25mm\u8986\u76d6\u8303\u56f4\u7684<strong>3\/4<\/strong>\uff0c\u4ece\u800c<strong>\u88c1\u5207\u51fa<\/strong>\u5176\u5149\u7ebf\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u60a8\u4e0d\u76f8\u4fe1\u81ea\u5df1\u4f1a\u5728\u6b64\u8fc7\u7a0b\u4e2d\u635f\u5931\u5149\uff0c\u8bf7\u8fd9\u6837\u8003\u8651\uff1a\u5149\u5c31\u662f<em>\u80fd\u91cf<\/em>\u3002\u60a8\u4e0d\u80fd\u540c\u65f6\u5728\u8d8a\u6765\u8d8a\u5927\u7684\u533a\u57df\u4e2d\u62e5\u6709\u76f8\u540c\u6570\u91cf\u7684\u80fd\u91cf\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u4e8b\u5b9e\u610f\u5473\u7740\uff0c\u5728<strong>\u76f8\u540c\u7684\u5149\u5708\u503c\uff08\u76f8\u5bf9\u5149\u5708\uff09\u548c\u89c6\u573a\u4e0b<\/strong>\uff0cM4 \/ 3\u76f8\u673a\u6240\u83b7\u5f97<strong>\u7684\u5149\u662f<\/strong>\u5168\u753b\u5e45\u76f8\u673a\u7684<strong>1\/4<\/strong>\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u7528\u901a\u7528\u516c\u5f0f\u8868\u793a\uff0c\u5728\u76f8\u540c\u7684f\u6863\u4e0b\uff0c\u4f5c\u7269\u4f20\u611f\u5668\u4e0a\u7684\u5149\uff08\u4f5c\u7269\u56e0\u5b50\uff09\u51cf\u5c11<sup>2<\/sup>\u3002<a rel=\"noreferrer noopener\" href=\"https:\/\/expertphotography.com\/understanding-fstops-stops-in-photography-exposure\/\" target=\"_blank\"><\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5982\u4f55\u907f\u514d\u4f5c\u7269\u56e0\u7d20\uff1f<\/h3>\n\n\n\n<p>\u7b80\u5355\u3002\u5bfb\u627e\u9002\u5408\u60a8\u7684\u519c\u7528\u76f8\u673a<em>\u4e14<\/em>\u5177\u6709\u76f8\u5339\u914d\u7684\u89c6\u91ce<em>\u548c&nbsp;<\/em>\u76f8\u540c\u5149\u5708<strong>\u5927\u5c0f<\/strong>\u7684\u955c\u5934\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5168\u753b\u5e45\u4e0a50mm f \/ 2\u76f8\u5f53\u4e8e\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u4e0a25mm f \/ 1\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\uff0c\u6b64\u89c4\u5219\u4ec5\u9002\u7528\u4e8e\u89c6\u91ce\u548c\u603b\u5149\u7ebf\uff08\u4ee5\u53ca\u666f\u6df1\uff09\u3002\u6e05\u6670\u5ea6\u548c\u7ec6\u8282\u4f1a\u53d7\u5230\u5176\u4ed6\u65b9\u9762\u7684\u5f71\u54cd\uff0c\u7a0d\u540e\u5c06\u5bf9\u5176\u8fdb\u884c\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n\n\n\n<p>\u5728\u4e0b\u9762\uff0c\u60a8\u53ef\u4ee5\u770b\u5230\u63a5\u6536\u76f8\u540c\u5149\u91cf\u7684\u67d0\u4e9b\u4f20\u611f\u5668\u5c3a\u5bf8\u548c\u955c\u5934\u7ec4\u5408\u3002\u4ed6\u4eec\u7ed9\u51fa\u4e86\u76f8\u540c\u7684\u89c6\u91ce\u3002\u5982\u679c\u5176\u4ed6\u56e0\u7d20\u4fdd\u6301\u4e0d\u53d8\uff0c\u5b83\u4eec\u4e5f\u5177\u6709\u76f8\u540c\u7684\u666f\u6df1\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence.gif\" alt=\"gif\u56fe\uff0c\u663e\u793a\u4e86\u5c06\u4e0d\u540c\u7684\u5149\u91cf\u548c\u76f8\u540c\u7684\u89c6\u573a\u6295\u5c04\u5230\u4e0d\u540c\u4f20\u611f\u5668\u7684\u7ec4\u5408\" class=\"wp-image-237751\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f5c\u7269\u56e0\u5b50\u5bf9\u666f\u6df1\u548c\u80cc\u666f\u6a21\u7cca\u7684\u5f71\u54cd<\/h3>\n\n\n\n<p>\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u6d88\u9664\u4e00\u4e2a\u795e\u8bdd\u3002<\/p>\n\n\n\n<p>\u666f\u6df1\u662f&nbsp;&nbsp;<strong>\u4e0d&nbsp;<\/strong>\u5f71\u54cd\u4efb\u4e00\u4f20\u611f\u5668\u7684\u5927\u5c0f\u6216\u7126\u8ddd\u3002\u5f71\u54cd\u5b83\u7684\u662f<em>\u60a8<\/em>\u5982\u4f55&nbsp;\u9002\u5e94\u4f20\u611f\u5668\u5c3a\u5bf8\u548c\u7126\u8ddd\u7684\u53d8\u5316\u3002<\/p>\n\n\n\n<p>\u5b83\u4ec5\u7531\u4e24\u4e2a\u56e0\u7d20\u51b3\u5b9a\uff1a<strong>\u805a\u7126\u8ddd\u79bb<\/strong>\u548c&nbsp;&nbsp;<strong>\u5149\u5708\u5927\u5c0f<\/strong>\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\u6709\u4e00\u4e2a\u8f6c\u6298\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u7ecf\u5e38\u4f7f\u7528<strong>f-stop<\/strong>\u6765\u6d4b\u91cf\u5149\u5708\u3002\u5728\u6052\u5b9a\u7684\u5149\u5708\u503c\u4e0b\uff0c\u7126\u8ddd\u7684\u589e\u52a0\u5bfc\u81f4\u5149\u5708\u5c3a\u5bf8\u7684\u589e\u52a0\u3002\u8fd9\u7ed9\u4eba\u4e00\u79cd<em>\u9519\u89c9<\/em>\uff0c\u5373\u7126\u8ddd\u4f1a\u5f71\u54cd\u666f\u6df1\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u8bf4\u660e\u8fd9\u4e00\u70b9\uff0c\u6211\u4f7f\u7528\u4e8624-70mm f \/ 2.8\u955c\u5934\u3002\u6240\u6709\u4e09\u4e2a\u56fe\u50cf\u90fd\u6765\u81ea\u540c\u4e00\u4f4d\u7f6e\u3002\u6211\u88c1\u526a\u523024\u6beb\u7c73\u955c\u5934\u4ee5\u5339\u914d70\u6beb\u7c73\u955c\u5934\u3002<strong><em>\u8fd9\u79cd\u88c1\u526a\u5177\u6709\u4e0e3\u500d\u88c1\u526a\u56e0\u5b50\u76f8\u540c\u7684\u6548\u679c\u3002&nbsp;<\/em><\/strong><\/p>\n\n\n\n<p>\u5e95\u90e8\u7684\u4e24\u4e2a\u56fe\u50cf\u5177\u6709\u76f8\u540c\u7684<em>\u5149\u5708\u5927\u5c0f\u3002<\/em>\u4ed6\u4eec\u7684\u666f\u6df1\u662f\u76f8\u540c\u7684\u3002<\/p>\n\n\n\n<p>\u9876\u90e8\u7684\u4e24\u4e2a\u56fe\u50cf\u5177\u6709\u76f8\u540c\u7684<em>\u76f8\u5bf9\u5149\u5708\uff08f-stop\uff09<\/em>\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5b83\u4eec\u7684\u666f\u6df1\u4f1a\u6709\u6240\u4e0d\u540c\u3002\u572870mm f \/ 2.8\u65f6\uff0c\u5c06\u8f83\u5927\u768425mm\u5149\u5708\u8bbe\u7f6e\u4e3a\u8f83\u6d45\u7684\u666f\u6df1\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-dof.png\" alt=\"\u7535\u8111\u952e\u76d8\u5728\u4e0d\u540c\u5149\u5708\u4e0b\u7684\u4e09\u5f20\u7167\u7247\" class=\"wp-image-237796\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<p><em>\u6ce8\u610f\uff1a\u5982\u679c\u60a8\u60f3\u77e5\u9053DoF\u7684\u7cbe\u786e\u6570\u91cf\uff0c\u5219\u9700\u8981\u8ba1\u7b97\u6df7\u4e71\u7684\u5706\u3002\u6211\u5728\u8fd9\u91cc\u7701\u7565\u4e86\u5b83\uff0c\u56e0\u4e3a\u5728\u672c\u6587\u4e2d\u6211\u4ec5\u6bd4\u8f83\u81ea\u7531\u5ea6\uff0c\u800c\u4e0d\u8ba1\u7b97\u5176\u5b9e\u9645\u6570\u91cf\u3002<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f7f\u7528\u7b49\u6548\u955c\u5934\u4fdd\u6301\u6a21\u7cca\u548c\u6563\u666f\u6052\u5b9a<\/h4>\n\n\n\n<p>\u968f\u7740\u589e\u52a0\u7126\u8ddd\uff0c\u80cc\u666f\u6a21\u7cca\u4e5f\u4f1a\u589e\u52a0\u3002\u5373\u4f7f\u4f7f\u7528\u56fa\u5b9a\u7684\u5149\u5708\u5927\u5c0f\uff08\u6309\u6bd4\u4f8b\u51cf\u5c0f\u7684\u5149\u5708\uff0c\u8be5\u89c4\u5219\u4e5f\u6709\u6548\uff09\u3002<\/p>\n\n\n\n<p>\u66f4\u957f\u7684\u8fdc\u6444\u7126\u8ddd\u53ef\u4ee5\u5728\u4efb\u4f55\u683c\u5f0f\u4e0b\u5e26\u6765\u66f4\u591a\u7684\u80cc\u666f\u538b\u7f29\u3002<\/p>\n\n\n\n<p>\u800c\u4e14\u5927\u591a\u6570\u65f6\u5019\u80cc\u666f\u662f\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p>\u60a8\u731c\u5bf9\u4e86\uff1a<em>\u6a21\u7cca<\/em>\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u552f\u4e00\u53d1\u751f\u7684\u662f\u6a21\u7cca\u53d8\u5f97\u66f4\u52a0\u660e\u663e\u3002\u5982\u679c\u5728\u6240\u6709\u4e0d\u540c\u683c\u5f0f\u4e2d\u4f7f\u7528\u7b49\u6548\u7684\u955c\u5934\uff0c\u5219\u6a21\u7cca\u91cf\u5c06\u76f8\u540c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-blur-bokeh.jpg\" alt=\"\u7528\u4e0d\u540c\u7684\u5149\u5708\u62cd\u6444\u7684\u4e24\u5f20\u7535\u8111\u952e\u76d8\u7167\u7247\" class=\"wp-image-237892\" title=\"%title\u63d2\u56fe%num\" \/><figcaption>\u7b2c\u4e8c\u5f20\u56fe\u50cf\u7684\u666f\u6df1\u8f83\u5c0f-\u4f46\u6563\u666f\u66f4\u660e\u663e<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u501f\u52a9\u7126\u8ddd\u53d8\u500d\u5668\u548c\u589e\u8ddd\u955c\u6539\u53d8\u89c6\u573a\u5e76\u5b9e\u73b0F-stop<\/h3>\n\n\n\n<p>\u662f\u5426\u60f3\u4ee5\u8fd1\u4f3c\u7b49\u6548\u7684\u65b9\u5f0f\u5728\u8f83\u5c0f\u7684\u4f20\u611f\u5668\u4e0a\u4f7f\u7528\u5168\u6846\u955c\u5934\uff1f\u60a8\u53ef\u4ee5\u9009\u62e9<\/p>\n\n\n\n<p>\u51cf\u7126\u5668\u6216\u589e\u901f\u5668\u662f\u5149\u5b66\u900f\u955c\u9002\u914d\u5668\uff0c\u4e5f\u79f0\u4e3a\u51cf\u7126\u5668\u3002<\/p>\n\n\n\n<p>\u672c\u8d28\u4e0a\uff0c\u5b83\u4eec\u51cf\u5c0f\u4e86\u6574\u4e2a\u5149\u5b66\u7cfb\u7edf\u7684\u7126\u8ddd\u3002<\/p>\n\n\n\n<p>\u5b83\u4eec\u5c06\u955c\u5934\u7684\u6295\u5f71\u66f4\u6539\u4e3a\u843d\u5728\u8f83\u5c0f\u7684\u533a\u57df\u4e0a\uff0c\u4ece\u800c\u5bfc\u81f4\u8be5\u533a\u57df\u4e0a\u7684\u5149\u5bc6\u5ea6\u66f4\u9ad8\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5f53\u60a8\u5b89\u88c5\u7126\u8ddd\u7f29\u5c0f\u5668\u65f6\uff0c\u4e0d\u4ec5\u4f1a<strong>\u6269\u5927\u89c6\u91ce\uff0c<\/strong>\u8fd8\u4f1a<strong>\u589e\u52a0f-stop<\/strong>\u3002\u7531\u6b64\u5f97\u540d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-speed-booster.jpg\" alt=\"\u7126\u8ddd\u964d\u4f4e\u5668\u4e0e50mm f \/ 1.8\u955c\u5934\u548c\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u76f8\u673a\u914d\u5408\u4f7f\u7528\" class=\"wp-image-238285\" title=\"%title\u63d2\u56fe%num\" \/><figcaption>\u7126\u8ddd\u964d\u4f4e\u5668\u4e0e50mm f \/ 1.8\u955c\u5934\u548c\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u76f8\u673a\u914d\u5408\u4f7f\u7528<\/figcaption><\/figure>\n\n\n\n<p>\u4e5f\u6709\u4e0e\u6b64\u76f8\u53cd\u7684\u89e3\u51b3\u65b9\u6848\u3002\u5982\u679c\u60a8\u60f3\u5728\u4e0d\u66f4\u6362\u8f83\u5c0f\u4f20\u611f\u5668\u7684\u60c5\u51b5\u4e0b\u6269\u5927\u8fdc\u6444\u955c\u5934\u7684\u8ddd\u79bb\uff0c\u8bf7\u4f7f\u7528\u589e\u8ddd\u955c\u3002<\/p>\n\n\n\n<p>\u5b83\u901a\u8fc7\u4ecb\u5165\u5149\u5b66\u7cfb\u7edf\u6765\u589e\u52a0\u7126\u8ddd\u3002\u5b83<strong>\u51cf\u5c0f\u4e86\u89c6\u91ce\u548cf-stop<\/strong>\u3002<\/p>\n\n\n\n<p>\u589e\u901f\u5668\u548c\u589e\u8ddd\u955c\u90fd\u4f1a\u964d\u4f4e\u5149\u5b66\u8d28\u91cf\u3002\u5982\u679c\u60a8\u9009\u62e9\u5176\u4e2d\u4efb\u4f55\u4e00\u4e2a\uff0c\u8bf7\u6ce8\u610f\u8fd9\u4e00\u70b9\u3002\u6700\u597d\u4ece\u77e5\u540d\u5236\u9020\u5546\u6216\u76f8\u673a\u5236\u9020\u5546\u672c\u8eab\u8d2d\u4e70\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0cMetabones\u4e3a\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u76f8\u673a\u63d0\u4f9b\u4e86\u51fa\u8272\u7684\u901f\u5ea6\u63d0\u5347\u5668\u3002\u4f7f\u7528\u8fd9\u4e9b\u955c\u5934\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u7126\u8ddd\u4e3a0.71\u62160.64\u7684\u5168\u753b\u5e45\u955c\u5934\u548cf-stop\u3002\u8fd9\u79cd\u52a9\u63a8\u5668\u51e0\u4e4e\u53ef\u4ee5\u8fd8\u539f\u5176\u5168\u753b\u5e45\u884c\u4e3a\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e\u524d\u9762\u8bf4\u660e\u7684\u539f\u56e0\uff0c\u589e\u901f\u5668\u6216\u589e\u8ddd\u955c\u90fd\u4e0d\u4f1a\u5f71\u54cd\u666f\u6df1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f5c\u7269\u56e0\u5b50\u5bf9ISO\u7684\u5f71\u54cd<\/h3>\n\n\n\n<p>\u663e\u7136\uff08\u4ece\u5149\u5708\u5f53\u91cf\uff09\uff0c\u60a8\u53ef\u4ee5\u770b\u5230\u88c1\u5207\u56e0\u6570\u4e5f\u9002\u7528\u4e8eISO\u3002F-stop\u63a9\u76d6\u4e86\u5b9e\u9645\u7684\u5149\u5708\u5927\u5c0f\u2013\u76f8\u673a\u5fc5\u987b\u5bf9\u6b64\u8fdb\u884c\u6821\u6b63\u3002<\/p>\n\n\n\n<p>\u60a8\u53ef\u80fd\u6ca1\u6709\u6ce8\u610f\u5230\u5b83\uff0c\u4f46\u662f\u8bc1\u636e\u5c31\u5728\u60a8\u7684\u773c\u524d\u3002<\/p>\n\n\n\n<p>\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u7269\u7406\u5b66\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f5c\u7269\u56e0\u5b50\u5bf9ISO\u5f71\u54cd\u7684\u8bf4\u660e\u6027\u4f8b\u5b50<\/h4>\n\n\n\n<p>\u53d6\u4e24\u4e2a<strong>\u77e9\u5f62<\/strong>\uff08\u8fd8\u4e0d\u662f\u4f20\u611f\u5668\uff09\u3002\u4e00\u79cd\u662f\u5fae\u578b\u56db\u5206\u4e4b\u4e09\uff08MFT\uff09\u4f20\u611f\u5668\u7684<em>\u5c3a\u5bf8<\/em>\u3002\u53e6\u4e00\u4e2a\u662f\u5168\u753b\u5e45\u4f20\u611f\u5668\u7684<em>\u5c3a\u5bf8<\/em>\u3002<\/p>\n\n\n\n<p>\u5c06\u5b83\u4eec\u653e\u5728\u5899\u4e0a\uff0c\u5f7c\u6b64\u53e0\u653e\uff0c\u4e0a\u9762\u7684\u8f83\u5c0f\u7684\u4e00\u4e2a\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\uff0c\u5c06\u6295\u5f71\u673a\u653e\u5728\u8fd1\u8ddd\u79bb\u3002\u5c06\u4eae\u5ea6\u5747\u5300\u7684\u56fe\u50cf\u6295\u5f71\u5230\u5899\u4e0a\u7684\u77e9\u5f62\u4e0a\u3002<\/p>\n\n\n\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6295\u5f71\u4eea\u548c\u77e9\u5f62\u7684<em>\u884c\u4e3a\u5c31\u50cf\u7167\u76f8\u673a\u7cfb\u7edf<\/em>\u3002<\/p>\n\n\n\n<p>\u8be5\u7cfb\u7edf\u5177\u6709\u4e00\u4e2a<em>\u5149\u6e90<\/em>&nbsp;-\u6295\u5f71\u4eea\u7684\u706f\uff0c\u53ef\u6295\u5c04\u4e00\u5b9a\u91cf\u7684\u5149\u3002<\/p>\n\n\n\n<p>\u6295\u5f71\u673a\u5185\u90e8\u6709\u4e00\u4e2a<em>\u955c\u5934<\/em>\u3002\u76f8\u673a\u955c\u5934\u7684\u4f4d\u7f6e\u5f88\u5947\u602a\uff0c\u4f46\u5de5\u4f5c\u539f\u7406\u76f8\u540c\u3002<\/p>\n\n\n\n<p>\u5e76\u4e14\uff0c\u5b83\u5177\u6709\u4e00\u4e2a<em>\u4f20\u611f\u5668<\/em>\uff0c\u8be5<em>\u4f20\u611f\u5668<\/em>\u5728\u5899\u4e0a\u5448\u5e73\u9762\u77e9\u5f62\u7684\u5f62\u5f0f\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-circle-of-projection.jpg\" alt=\"\u56fe\uff0c\u4f7f\u7528\u6295\u5f71\u4eea\u89e3\u91ca\u4f5c\u7269\u56e0\u5b50\u5bf9ISO\u7684\u5f71\u54cd\" class=\"wp-image-237916\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<p>\u7a81\u8d77\u662f\u5706\u5f62\u7684\u3002<em>\u6ce8\u610f\uff1a\u5728\u771f\u5b9e\u7684\u76f8\u673a\u7cfb\u7edf\u4e2d\uff0c\u603b\u662f\u5982\u6b64\u3002\u955c\u5934\u4e2d\u7684\u67d0\u4e9b\u90e8\u5206\u53ef\u80fd\u4f1a\u5c06\u5176\u5207\u6210\u77e9\u5f62\u3002\u73bb\u7483\u672c\u8eab\u603b\u662f\u6295\u5c04\u51fa\u5706\u5f62\u56fe\u50cf\u3002<\/em><\/p>\n\n\n\n<p>\u5b83\u7684\u5149\u7ebf\u5747\u5300\u5730\u7167\u5c04\u77e9\u5f62\u3002\u6bcf\u79d2\u90fd\u6709\u603b\u8ba1\u4ece\u6295\u5f71\u673a\u53d1\u51fa\u7684\u5149\u3002\u663e\u7136\uff0c\u77e9\u5f62\u5e76\u4e0d\u80fd\u5168\u90e8\u663e\u793a\u3002<\/p>\n\n\n\n<p>\u8f83\u5927\u7684\u77e9\u5f62\u4ece\u6295\u5f71\u4e2d<em>\u5207\u51fa<\/em>\u4e00\u90e8\u5206\u3002\u5b83\u6ca1\u6709\u610f\u4e49\uff0c\u56e0\u4e3a\u5b83<em>\u8d85\u51fa\u4e86\u5b83\u7684\u8986\u76d6\u8303\u56f4<\/em>\u3002\u649e\u51fb\u5927\u77e9\u5f62\u7684\u5149\u91cf\u5df2\u7ecf\u5c0f\u4e8e\u603b\u91cf\u3002<\/p>\n\n\n\n<p>\u8f83\u5c0f\u7684\u77e9\u5f62\u653e\u7f6e\u5728\u8f83\u5927\u7684\u77e9\u5f62\u5185-\u5176\u8986\u76d6\u8303\u56f4\u66f4\u5c0f\u3002\u56e0\u6b64\uff0c\u5b83\u524a\u51cf\u4e86\u603b\u6295\u5f71\u7684\u4e00\u5c0f\u90e8\u5206\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-circle-of-projection-2.jpg\" alt=\"\u56fe\uff0c\u4f7f\u7528\u6295\u5f71\u4eea\u89e3\u91ca\u4f5c\u7269\u56e0\u5b50\u5bf9ISO\u7684\u5f71\u54cd\" class=\"wp-image-237922\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<p>\u5982\u679c\u6295\u5f71\u7684\u4eae\u5ea6\u5747\u5300\uff0c\u5219\u5404\u5904\u7684\u5149\u5bc6\u5ea6\u76f8\u540c\u3002\u8fd9\u610f\u5473\u7740\u8f83\u5c0f\u7684\u533a\u57df\u6bd4\u8f83\u5927\u7684\u533a\u57df<strong>\u6309\u6bd4\u4f8b<\/strong>\u83b7\u5f97<strong>\u8f83\u5c11\u7684\u5149\u7ebf<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u8ba1\u7b97\u65b9\u5f0f<\/h4>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u7528\u6570\u5b57\u6765\u8868\u8fbe\u3002\u6211\u4eec\u5fc5\u987b\u8ba1\u7b97\u77e9\u5f62\u7684\u9762\u79ef\uff0c\u4ee5\u83b7\u53d6\u843d\u5728\u6bcf\u4e2a\u77e9\u5f62\u4e0a\u7684\u5149\u7684\u6bd4\u4f8b\u3002<\/p>\n\n\n\n<p>MFT\u5927\u5c0f\u7684\u77e9\u5f62\u7684\u9762\u79ef\u4e3a2,24 cm&nbsp;<sup>2<\/sup>\uff0c\u800c\u5168\u5e27\u5927\u5c0f\u7684\u77e9\u5f62\u7684\u9762\u79ef\u4e3a8,64 cm&nbsp;<sup>2<\/sup>\u3002<\/p>\n\n\n\n<p>\u5c06\u4e24\u8005\u76f8\u9664\uff0c\u60a8\u4f1a\u53d1\u73b0\u843d\u5728\u5168\u5e27\u77e9\u5f62\u4e0a\u7684\u5149\u603b\u91cf\u6bd4MFT\u5c3a\u5bf8\u7684\u591a3.85\u500d\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u6570\u5b57\uff08\u6beb\u4e0d\u5947\u602a\uff09\u63a5\u8fd1MFT\u7684\u4f5c\u7269\u56e0\u5b502\u00a0<sup>2<\/sup>\u3002\u5b83\u4e0d\u5b8c\u5168\u76f8\u7b49\u7684\u539f\u56e0\u662f\u4e0d\u540c\u7684\u5bbd\u9ad8\u6bd4\u3002\u5bf9\u4e8e\u4ee5\u4e0b\u5185\u5bb9\uff0c\u6211\u4eec\u5c06\u5176\u5411\u4e0a\u820d\u5165\u4e3a4\u3002<\/p>\n\n\n\n<p><em>\u5982\u679c\u6211\u4eec\u4f7f\u7528APS-C\u8fdb\u884c\u8ba1\u7b97\uff0c\u5219\u5c06\u4e3a1.5&nbsp;<sup>2<\/sup>&nbsp;=&nbsp;<strong>2.25\u3002<\/strong><\/em><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/equivalence-areas-iso.jpg\" alt=\"\u6bd4\u8f83\u5168\u5e27\u4f20\u611f\u5668\u548c\u5fae\u578b\u56db\u5206\u4e4b\u4e09\u4f20\u611f\u5668\u7684\u793a\u610f\u56fe \" class=\"wp-image-237925\" title=\"%title\u63d2\u56fe%num\" \/><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">ISO\u7b49\u6548\u5728\u5b9e\u8df5\u4e2d\u610f\u5473\u7740\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p>\u8ba9\u6211\u4eec\u5c06\u77e9\u5f62\u6362\u6210<strong>\u771f\u5b9e\u7684\u4f20\u611f\u5668<\/strong>\u3002\u6211\u4eec\u4e0d\u5fc5\u77e5\u9053\u5b83\u4eec\u7684\u50cf\u7d20\u6570-\u6211\u4eec\u53ea\u9700\u8981\u6839\u636e\u5b83\u4eec\u7684\u9762\u79ef\u4ee5\u53ca\u5b83\u4eec\u7684\u603b\u5149\u7ebf\u611f\u77e5\u6765\u8fdb\u884c\u8ba1\u7b97\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\uff0c\u6211\u4eec\u5fc5\u987b\u5047\u8bbe\u5b83\u4eec\u5177\u6709\u76f8\u540c\u7684\u50cf\u7d20\u6570\u2013\u6211\u4eec\u8fd8\u4e0d\u9700\u8981\u989d\u5916\u7684\u53d8\u91cf\u3002\u4e3a\u4e86\u6bd4\u8f83\u566a\u58f0\u6c34\u5e73\uff0c\u6211\u4eec\u8fd8\u5047\u8bbe\u4e24\u4e2a\u4f20\u611f\u5668\u4f7f\u7528\u76f8\u4f3c\u7684\u6280\u672f\uff0c\u5e76\u4e14\u5b83\u4eec\u7684\u5bff\u547d\u548c\u78e8\u635f\u6c34\u5e73\u76f8\u540c\u3002<\/p>\n\n\n\n<p>\u6211\u53ef\u80fd\u4f1a\u4e3a\u6b64\u611f\u5230\u60ca\u8bb6\u3002\u6bcf\u4e2a\u76f8\u673a\u7684ISO\u7b49\u7ea7\u90fd\u4e0d\u76f8\u540c\u3002<strong>ISO\u503c\u4e0d\u4ee3\u8868\u4efb\u4f55\u5b9a\u4e49\u7684\u611f\u5149\u5ea6<\/strong>\u3002<\/p>\n\n\n\n<p>\u76f8\u53cd\uff0cISO\u6807\u51c6\u57fa\u4e8e\u66dd\u5149\u503c\u548c\u573a\u666f\u4eae\u5ea6\u3002\u5b83\u57281973\u5e74\u548c1986\u5e74\u7684\u4e24\u4e2aANSI\u66b4\u9732\u6307\u5357\u4e2d\u8fdb\u884c\u4e86\u6807\u51c6\u5316\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0cISO\u503c\u4e0d\u53d6\u51b3\u4e8e\u653e\u5927\u7387\u6216\u7075\u654f\u5ea6\u3002\u5b83\u4eec\u662f<strong>\u7531\u5916\u90e8\u73af\u5883\u51b3\u5b9a\u7684<\/strong>\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\uff0c\u5982\u679c\u67d0\u4e2a\u4f20\u611f\u5668\u4ece\u7279\u5b9a\u573a\u666f\u83b7\u5f97\u7684\u5149\u5c11\u4e8e\u53e6\u4e00\u4f20\u611f\u5668\uff0c\u5219&nbsp;&nbsp;<strong><em>\u5fc5\u987b\u66f4\u654f\u611f<\/em><\/strong>\u624d\u80fd\u8fbe\u5230<em>\u76f8\u540c\u7684<\/em>&nbsp;ISO\u503c\u3002<\/p>\n\n\n\n<p>\u8ba9\u6211\u4eec\u56de\u5230MFT\u548c\u5168\u753b\u5e45\u793a\u4f8b\u3002\u5728<strong>\u76f8\u540c\u7684\u7126\u8ddd\u548c\u76f8\u540c\u7684\u5149\u5708\u503c\u4e0b<\/strong>\uff0cMFT\u4f20\u611f\u5668\u5728\u4efb\u4f55\u7ed9\u5b9a\u573a\u666f\u4e2d\u83b7\u5f97\u7684\u5149\u8981\u6bd4\u5168\u5e27\u4f20\u611f\u5668\u5c114\u500d\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\u6765\u81eaMFT\u4f20\u611f\u5668\u7684\u6570\u636e\u5fc5\u987b\u653e\u59274\u500d\u4ee5\u4e0a\u624d\u80fd\u8fbe\u5230\u76f8\u540c\u7684\u66dd\u5149\u7387\u3002\u56e0\u6b64\uff0cMFT\u4e0a\u7684\u4efb\u4f55ISO\u7ea7\u522b\u7684\u653e\u5927\u7387\u90fd\u662f\u5168\u753b\u5e45\u4f20\u611f\u5668\u4e0a\u76844\u500d\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u8ba9\u6211\u4eec\u7528\u4e24\u4e2a\u76f8\u673a\u8bbe\u7f6e\u6765\u8bf4\u660e\u8fd9\u4e00\u70b9\u3002\u4e00\u4e2a\u662fMFT\u4f20\u611f\u5668\uff0c\u5e26\u670925mm f \/ 2\u955c\u5934\u3002\u53e6\u4e00\u4e2a\u662f\u5e26\u670950mm f \/ 2\u955c\u5934\u7684\u5168\u753b\u5e45\u4f20\u611f\u5668\u3002\u518d\u6b21\uff0c\u4e3a\u4e86\u6392\u9664\u4e0d\u5fc5\u8981\u7684\u53d8\u91cf\uff0c\u6211\u4eec\u5047\u5b9a\u5b83\u4eec\u5177\u6709\u76f8\u540c\u7684T\u505c\u6b62\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u4f7f\u7528\u4e24\u79cd\u8bbe\u7f6e\u62cd\u6444\u5bf9\u8c61\u7684\u56fe\u50cf\u3002\u6211\u4eec\u5c06\u5b83\u4eec\u8bbe\u7f6e\u4e3a\u624b\u52a8\u6a21\u5f0f\uff1a\u5747\u4e3af \/ 2\u30011 \/ 100s\u548cISO100\u3002<em>\u66dd\u5149\u5c06\u76f8\u540c<\/em>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u566a\u97f3\u6c34\u5e73<\/h3>\n\n\n\n<p>\u4f46\u662f\uff0c\u5982\u679c\u5c06\u4e24\u8005\u90fd\u653e\u5927\u5230100\uff05\uff0c\u60a8\u4f1a\u53d1\u73b0\u4e00\u4ef6\u4e8b\u3002MFT\u4f20\u611f\u5668\u4e0a\u7684\u566a\u58f0\u6c34\u5e73\u5f88\u6709\u53ef\u80fd\u4f1a\u66f4\u9ad8\u3002\u5c31\u50cf\u5728\u5168\u5e45\u673a\u4e0a\u4ee5ISO 400\u62cd\u6444\u65f6\u4e00\u6837\u3002<\/p>\n\n\n\n<p>\u5230\u5e95\u53d1\u751f\u4e86\u4ec0\u4e48\u3002\u4e3a\u4e86\u5728ISO 100\u4e0b\u63d0\u4f9b\u6b63\u786e\u7684\u66dd\u5149\uff0cMFT\u76f8\u673a\u5fc5\u987b\u4e0e\u5168\u753b\u5e45\u76f8\u673a\u5728ISO 400\u4e0b\u4e00\u6837\u654f\u611f\u3002<\/p>\n\n\n\n<p>\u60a8\u4e5f\u53ef\u4ee5\u91c7\u7528\u4e0d\u540c\u7684\u65b9\u6cd5\u3002\u5728\u8f83\u5c0f\u7684\u4f20\u611f\u5668\u4e0a\uff0c\u4fe1\u566a\u6bd4\u5c06\u8f83\u4f4e\u3002\u56e0\u6b64\uff0c\u8981\u4f7f\u4fe1\u53f7\u8fbe\u5230\u8bbe\u5b9a\u7684\u6c34\u5e73\uff0c\u60a8\u8fd8\u5fc5\u987b\u63d0\u9ad8\u566a\u58f0\u6c34\u5e73\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\uff0c\u65e0\u8bba\u5982\u4f55\u8fd9\u90fd\u4e0d\u662f\u95ee\u9898\u3002\u8fd9\u53ea\u662f\u7269\u7406\u5b66\u3002\u5728\u826f\u597d\u7684\u7167\u660e\u6761\u4ef6\u4e0b\uff0c\u4efb\u4f55\u4f20\u611f\u5668\u7684\u6027\u80fd\u90fd\u5f88\u597d\uff0c\u6ca1\u6709\u660e\u663e\u7684\u566a\u97f3\u3002\u4ec5\u5f53\u60a8\u5728\u5149\u7ebf\u8f83\u6697\u6216\u4ee5\u8f83\u5927\u5c3a\u5bf8\u6253\u5370\u56fe\u50cf\u65f6\uff0c\u60a8\u624d\u4f1a\u6ce8\u610f\u5230\u8fd9\u4e00\u70b9\u3002<\/p>\n\n\n\n<p>\u5373\u4f7f\u5728\u540c\u4e00\u4ee3\uff0c\u76f8\u540c\u5c3a\u5bf8\u7684\u4f20\u611f\u5668\u4e0a\uff0c\u566a\u58f0\u6c34\u5e73\u4e5f\u5b58\u5728\u5f88\u5927\u5dee\u5f02\uff0c\u8fd9\u4e5f\u662f\u5f88\u5e38\u89c1\u7684\u3002\u539f\u56e0\u5728\u4e8e\u6280\u672f\u53d8\u5316\uff0c\u8fdb\u6b65\u548c\u4ef7\u683c\u5dee\u5f02\u3002<\/p>\n\n\n\n<p>\u90a3\u4e48\uff0cISO\u7684\u610f\u4e49\u4f55\u5728\uff1f<\/p>\n\n\n\n<p>ISO\u662f\u4e00\u4e2a\u6709\u7528\u7684\u8bbe\u7f6e\uff0c\u56e0\u4e3a\u540c\u4e00\u7ec4\u66dd\u5149\u5c06\u5728\u6240\u6709\u76f8\u673a\u4e0a\u5de5\u4f5c\u3002\u4f46\u662f\uff0c\u5b83\u786e\u5b9e\u63a9\u76d6\u4e86\u4f20\u611f\u5668\u83b7\u5f97\u591a\u5c11\u5149\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u50cf\u7d20\u7ea7\u6548\u679c<\/h3>\n\n\n\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u8fdb\u884c\u4e86\u7b80\u5316\u3002\u6211\u4eec\u5047\u8bbe\u4f20\u611f\u5668\u7684\u5de5\u4f5c\u65b9\u5f0f\u7c7b\u4f3c\u4e8e\u80f6\u7247\uff0c\u5373\u5bf9\u5149\u654f\u611f\u7684\u8fde\u7eed\u8868\u9762\u3002<\/p>\n\n\n\n<p>\u4ed6\u4eec\u4e0d\u662f\u90a3\u6837\u7684\u3002\u4f20\u611f\u5668\u6709\u50cf\u7d20\u3002\u50cf\u7d20\u672c\u8eab\u6709\u4e00\u4e2a\u5927\u5c0f-\u8be5\u5927\u5c0f\u5305\u62ec\u6709\u7528\u548c\u4e0d\u6709\u7528\u7684\u533a\u57df\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u8ba9\u6211\u4eec\u5c06\u767e\u4e07\u50cf\u7d20\u5e26\u5165\u8fd9\u4e00\u601d\u8003\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<p>\u5e0c\u671b\u6211\u5df2\u7ecf\u8bf4\u670d\u60a8\uff0c\u66f4\u5927\u7684\u8868\u9762\u610f\u5473\u7740\u66f4\u591a\u7684\u5149\u7ebf\u3002\u50cf\u7d20\u4e5f\u4e00\u6837\u3002<\/p>\n\n\n\n<p>\u8f83\u5927\u7684\u50cf\u7d20\u4f1a\u805a\u96c6\u66f4\u591a\u7684\u5149\u2013\u8f83\u5c0f\u7684\u50cf\u7d20\u4f1a\u805a\u96c6\u8f83\u5c11\u7684\u5149\uff08\u5982\u679c\u5176\u4ed6\u6240\u6709\u6761\u4ef6\u4e0d\u53d8\uff09\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5982\u679c\u6211\u4eec\u5bf9\u5168\u57dfISO\u6548\u679c\u4e0d\u611f\u5174\u8da3\uff0c\u800c\u5bf9\u50cf\u7d20\u7ea7\u6548\u679c\u611f\u5174\u8da3\uff0c\u5219\u5fc5\u987b\u8003\u8651\u50cf\u7d20\u5927\u5c0f\u3002<br>24MP\u5168\u753b\u5e45\u76f8\u673a\u7684\u50cf\u7d20\u6bd424MP\u88c1\u526a\u76f8\u673a\uff08\u4f8b\u5982MFT\u76f8\u673a\uff09\u66f4\u5927\u3002<\/p>\n\n\n\n<p>MFT\u4e0a\u768424MP\u8868\u793a\u50cf\u7d20\u5bc6\u5ea6\u7684\u4e24\u500d\u300296MP\u7684\u5168\u753b\u5e45\u76f8\u673a\u5c06\u5177\u6709\u76f8\u540c\u7684\u5bc6\u5ea6\u3002<\/p>\n\n\n\n<p>\u5728\u90a3\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5168\u753b\u5e45\u4f20\u611f\u5668\u7684\u4e2d\u95f41\/4\u6765\u6a21\u62dfMFT\u4f20\u611f\u5668\u7684\u6bcf\u4e2a\u5149\u5b66\u7279\u6027\u3002<\/p>\n\n\n\n<p>\u653e\u5927\u5230100\uff05\uff0c\u5b83\u4eec\u4e5f\u5c06\u5177\u6709\u76f8\u540c\u7684\u566a\u58f0\u6c34\u5e73\u3002<\/p>\n\n\n\n<h3 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class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-ep19.pressidium.com\/wp-content\/uploads\/2019\/12\/MTF-Grid-Structure.jpg\" alt=\"MTF\u7f51\u683c\u7ed3\u6784\u56fe\" class=\"wp-image-238324\" title=\"%title\u63d2\u56fe%num\" 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