【科普系列】镜头毫米数选择
<section style="background-color: rgb(255, 255, 255); box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin: 10px 0%;box-sizing: border-box; "><section class="" style="display: inline-block; width: 100%; vertical-align: top; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-right: 0%; margin-bottom: -65px; margin-left: 0%; font-size: 16px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="text-align: center; font-size: 32px; color: rgb(143, 121, 71); letter-spacing: 2px; line-height: 1; box-sizing: border-box;"><p style="box-sizing: border-box;">- <span style="font-size: 24px; box-sizing: border-box;">镜头毫米数选择</span> -</p><p style="box-sizing: border-box;"><span style="font-size: 14px; box-sizing: border-box;">LENS CHOICE</span></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "><section class="" style="width: 5em; margin-left: auto; box-sizing: border-box;"><section style="width: 6px; height: 6px; margin-left: auto; margin-bottom: 0.5em; margin-right: 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-top: -0.6em; margin-left: 4.4em; box-sizing: border-box;"></section></section><section class="" style="padding-right: 0.5em; padding-left: 0.5em; margin-top: -2.6em; margin-bottom: -2.6em; box-sizing: border-box;"><section class="" style="padding: 10px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 14px; box-sizing: border-box;"><p style="text-indent: 2em; box-sizing: border-box;">一般情况下，同一型号的摄像机，都会有多个镜头毫米数可供选择。可是很多朋友对镜头毫米数没有具体概念，不知道什么样的监控场景要选择多少毫米的镜头才比较合适。</p></section></section></section></section></section><section class="" style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-bottom: -0.6em; margin-left: 0.6em; box-sizing: border-box;"></section><section class="" style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section class="" style="width: 6px; height: 6px; margin: 0.5em 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 14px; box-sizing: border-box;"><p style="text-indent: 2em; box-sizing: border-box;">那么康康就特意整理了一篇文章，希望可以帮助大家对镜头毫米数有个直观的了解。<br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px; text-align: center;box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; margin-bottom: -0.9em; box-sizing: border-box;"><section style="display: inline-block; vertical-align: bottom; border-right: 0.4em solid rgb(147, 54, 29); border-top: 0.4em solid rgb(147, 54, 29); max-width: 5% !important; border-bottom: 0.4em solid transparent !important; border-left: 0.4em solid transparent !important; box-sizing: border-box;"></section><section class="" style="display: inline-block; vertical-align: top; border-radius: 5px 5px 0px 0px; background-color: rgb(241, 54, 63); padding: 2px 5px; font-size: 24px; line-height: 1.2em; color: rgb(255, 255, 255); max-width: 90% !important; box-sizing: border-box;"><p style="box-sizing: border-box;"> 镜头焦距 </p></section><section style="display: inline-block; vertical-align: bottom; border-top: 0.4em solid rgb(147, 54, 29); border-left: 0.4em solid rgb(147, 54, 29); max-width: 5% !important; border-right: 0.4em solid transparent !important; border-bottom: 0.4em solid transparent !important; box-sizing: border-box;"></section></section><section class="" style="height: 0.9em; border-top: 3px solid rgb(0, 0, 0); width: 100%; box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "><section class="" style="width: 6px; height: 6px; margin-top: 0.5em; margin-right: 0.4em; margin-left: 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section class="" style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-bottom: -2.4em; margin-left: 0.6em; box-sizing: border-box;"></section><section class="" style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section class="" style="padding-right: 0.5em; padding-left: 0.5em; box-sizing: border-box;"><section class="" style="padding: 10px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 14px; box-sizing: border-box;"><p style="text-indent: 2em; box-sizing: border-box;">镜头焦距，也就是我们常说的镜头毫米数，指平行光入射时，从透镜光心到光聚集之焦点的距离。</p><p style="text-indent: 2em; box-sizing: border-box;">镜头焦距的长短决定了拍摄的成像大小、视场角大小、景深大小和画面的透视强弱等。</p></section></section></section></section></section><section class="" style="width: 5em; margin-left: auto; box-sizing: border-box;"><section style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-top: -2.4em; margin-left: 4.4em; box-sizing: border-box;"></section><section style="width: 6px; height: 6px; margin-left: auto; margin-right: 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 0.5em; margin-bottom: 0.5em; padding-left: 0.5em; padding-right: 0.5em;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 14px; box-sizing: border-box;"><p style="text-indent: 2em; box-sizing: border-box;">如上图所示，同样的场景，镜头焦距选择不同，所拍摄到的图像也有所不同。<br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px; text-align: center;box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; margin-bottom: -0.9em; box-sizing: border-box;"><section style="display: inline-block; vertical-align: bottom; border-right: 0.4em solid rgb(147, 54, 29); border-top: 0.4em solid rgb(147, 54, 29); max-width: 5% !important; border-bottom: 0.4em solid transparent !important; border-left: 0.4em solid transparent !important; box-sizing: border-box;"></section><section class="" style="display: inline-block; vertical-align: top; border-radius: 5px 5px 0px 0px; background-color: rgb(241, 54, 63); padding: 2px 5px; font-size: 24px; line-height: 1.2em; color: rgb(255, 255, 255); max-width: 90% !important; box-sizing: border-box;"><p style="box-sizing: border-box;">物距</p></section><section style="display: inline-block; vertical-align: bottom; border-top: 0.4em solid rgb(147, 54, 29); border-left: 0.4em solid rgb(147, 54, 29); max-width: 5% !important; border-right: 0.4em solid transparent !important; border-bottom: 0.4em solid transparent !important; box-sizing: border-box;"></section></section><section class="" style="height: 0.9em; border-top: 3px solid rgb(0, 0, 0); width: 100%; box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "><section class="" style="width: 6px; height: 6px; margin-top: 0.5em; margin-right: 0.4em; margin-left: 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section class="" style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-bottom: -2.4em; margin-left: 0.6em; box-sizing: border-box;"></section><section class="" style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section class="" style="padding-right: 0.5em; padding-left: 0.5em; box-sizing: border-box;"><section class="" style="padding: 10px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="text-align: center; font-size: 14px; box-sizing: border-box;"><p style="text-align: left; text-indent: 2em; box-sizing: border-box;">物距是摄像机镜头到拍摄对象之间的距离。例如，需要拍摄马路对面的车辆，则摄像机与车之间的距离即为物距。</p></section></section></section></section></section><section class="" style="width: 5em; margin-left: auto; box-sizing: border-box;"><section style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-top: -2.4em; margin-left: 4.4em; box-sizing: border-box;"></section><section style="width: 6px; height: 6px; margin-left: auto; margin-right: 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px; text-align: center;box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; margin-bottom: -0.9em; box-sizing: border-box;"><section style="display: inline-block; vertical-align: bottom; border-right: 0.4em solid rgb(147, 54, 29); border-top: 0.4em solid rgb(147, 54, 29); max-width: 5% !important; border-bottom: 0.4em solid transparent !important; border-left: 0.4em solid transparent !important; box-sizing: border-box;"></section><section class="" style="display: inline-block; vertical-align: top; border-radius: 5px 5px 0px 0px; background-color: rgb(241, 54, 63); padding: 2px 5px; font-size: 24px; line-height: 1.2em; color: rgb(255, 255, 255); max-width: 90% !important; box-sizing: border-box;"><p style="box-sizing: border-box;">视场角</p></section><section style="display: inline-block; vertical-align: bottom; border-top: 0.4em solid rgb(147, 54, 29); border-left: 0.4em solid rgb(147, 54, 29); max-width: 5% !important; border-right: 0.4em solid transparent !important; border-bottom: 0.4em solid transparent !important; box-sizing: border-box;"></section></section><section class="" style="height: 0.9em; border-top: 3px solid rgb(0, 0, 0); width: 100%; box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "><section class="" style="width: 6px; height: 6px; margin-top: 0.5em; margin-right: 0.4em; margin-left: 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section class="" style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-bottom: -2.4em; margin-left: 0.6em; box-sizing: border-box;"></section><section class="" style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section class="" style="padding-right: 0.5em; padding-left: 0.5em; box-sizing: border-box;"><section class="" style="padding: 10px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 14px; box-sizing: border-box;"><p style="text-indent: 2em; box-sizing: border-box;">视场角简单的说就是以镜头为顶点，摄像机可以拍摄到的最大角度。</p><p style="text-indent: 2em; box-sizing: border-box;">视场角的大小决定了镜头的视野范围，视场角越大，视野就越大。</p><p style="text-indent: 2em; box-sizing: border-box;">通俗地说，目标物体超过这个角就不会被收在镜头里。</p></section></section></section></section></section><section class="" style="width: 5em; margin-left: auto; box-sizing: border-box;"><section style="width: 5em; border-top: 1px solid rgb(158, 158, 158); box-sizing: border-box;"></section><section style="height: 3em; border-left: 1px solid rgb(158, 158, 158); margin-top: -2.4em; margin-left: 4.4em; box-sizing: border-box;"></section><section style="width: 6px; height: 6px; margin-left: auto; margin-right: 0.4em; border-radius: 100%; background-color: rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 0.5em; margin-bottom: 0.5em; padding-left: 0.5em; padding-right: 0.5em;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px; text-align: center;box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; margin-bottom: -0.9em; box-sizing: border-box;"><section style="display: inline-block; vertical-align: bottom; border-right: 0.4em solid rgb(255, 129, 36); border-top: 0.4em solid rgb(255, 129, 36); max-width: 5% !important; border-bottom: 0.4em solid transparent !important; border-left: 0.4em solid transparent !important; box-sizing: border-box;"></section><section class="" style="display: inline-block; vertical-align: top; border-radius: 5px 5px 0px 0px; background-color: rgb(255, 202, 0); padding: 2px 5px; font-size: 24px; line-height: 1.2em; color: rgb(255, 255, 255); max-width: 90% !important; box-sizing: border-box;"><p style="box-sizing: border-box;"> 三者之间关系 </p></section><section style="display: inline-block; vertical-align: bottom; border-top: 0.4em solid rgb(255, 129, 36); border-left: 0.4em solid rgb(255, 129, 36); max-width: 5% !important; border-right: 0.4em solid transparent !important; border-bottom: 0.4em solid transparent !important; box-sizing: border-box;"></section></section><section class="" style="height: 0.9em; border-top: 3px solid rgb(0, 0, 0); width: 100%; box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em; text-align: center;box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="width: 20px; height: 20px; float: left; border-top: 2px solid rgba(248, 72, 103, 0.933333); border-left: 2px solid rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section style="width: 20px; height: 20px; float: right; border-top: 2px solid rgba(248, 72, 103, 0.933333); border-right: 2px solid rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section style="clear: both; box-sizing: border-box;"></section><section style="margin-top: -20px; margin-bottom: -20px; box-sizing: border-box;"><section class="" style="border-width: 2px; border-style: dotted; border-color: rgb(233, 233, 233); padding: 10px 20px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 14px; box-sizing: border-box;"><p style="clear: none; box-sizing: border-box;">焦距越大，可视距离越远，视场角越小</p><p style="clear: none; box-sizing: border-box;">焦距越小，可视距离越近，视场角越大</p></section></section></section></section></section><section style="width: 20px; height: 20px; float: left; border-bottom: 2px solid rgba(248, 72, 103, 0.933333); border-left: 2px solid rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section style="width: 20px; height: 20px; float: right; border-bottom: 2px solid rgba(248, 72, 103, 0.933333); border-right: 2px solid rgba(248, 72, 103, 0.933333); box-sizing: border-box;"></section><section style="clear: both; box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" transform: translate3d(0px, 0px, 0px); -webkit-transform: translate3d(0px, 0px, 0px); -moz-transform: translate3d(0px, 0px, 0px); -o-transform: translate3d(0px, 0px, 0px); text-align: center; margin: 10px 0%;box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: middle; width: 10%; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: right; margin-top: 10px; margin-bottom: 10px; transform: translate3d(0px, 0px, 0px); -webkit-transform: translate3d(0px, 0px, 0px); -moz-transform: translate3d(0px, 0px, 0px); -o-transform: translate3d(0px, 0px, 0px);box-sizing: border-box; "></section></section></section><section class="" style="display: inline-block; vertical-align: middle; width: 30%; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 21px; padding-right: 20px; padding-left: 20px; color: rgb(122, 98, 103); box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">END</strong></p></section></section></section></section><section class="" style="display: inline-block; vertical-align: middle; width: 10%; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: left; margin-top: 10px; margin-bottom: 10px; transform: translate3d(0px, 0px, 0px); -webkit-transform: translate3d(0px, 0px, 0px); -moz-transform: translate3d(0px, 0px, 0px); -o-transform: translate3d(0px, 0px, 0px);box-sizing: border-box; "></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px; text-align: center;box-sizing: border-box; "><section class="" style="display: inline-block; width: 20em; margin-right: auto; margin-left: auto; box-sizing: border-box;"><section style="width: 0px; margin-left: auto; border-left: 9em solid rgb(88, 159, 205); border-bottom: 0.5em solid rgb(88, 159, 205); border-top: 0.5em solid transparent !important; border-right: 9em solid transparent !important; box-sizing: border-box;"></section><section class="" style="padding: 10px; background-color: rgb(247, 242, 236); box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="font-size: 14px; box-sizing: border-box;"><p style="box-sizing: border-box;">希望康康的整理，对你有所帮助<br style="box-sizing: border-box;"></p></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin: 10px 0%;box-sizing: border-box; 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