同时在摄远时长焦镜头给更小画幅相机带来的冲击力也会随之消失。
You also lose the focal length 'boost' offered by smaller sensor cameras when shooting with telephotos.
灯光的焦平面位于平均海平面以上200尺，如天气清朗，远至23海里的水域也能看见。
The focal plane of the light is 200 feet above mean sea level, and in clear weather it should be seen at a distance of 23 nautical miles.
介绍远焦小型变焦距物镜的设计原理及方法。
The design methodology of miniature linear zoom objective lens of far-focus is presented.
应用推荐