A. To make the camera look cool B. To protect the lens from scratches C. To block unwanted light D. To increase the zoom range 相关知识点: 试题来源: 解析 C。选项 A 不是主要目的。选项 B 通常是 UV 镜等的作用。选项 C“To block unwanted light”镜头遮光罩的主要目的是阻挡不必要的光线。
PURPOSE: A multi-functional hood for a portable communication terminal is provided to reduce power consumption of a liquid display window and prevent a users privacy from being invaded, and easily control focus of a camera lens by interrupting rays. CONSTITUTION: A foldaway hood(113) is mounted ...
The laser light is scattered as it interacts with the particles (under Brownian motion) within the chamber, and the scattered light is collected by a microscope that has a camera mounted to it [136]. The camera on top of the microscope captures the movement of particles in a video, and ...
If you willing to help further the astro-community's knowledge of the D5300, I would be most interested in seeing a series of ISO 200 flats taken with that lens at a series of different exposure levels starting with the back-of-camera histogram peak halfway across and then becoming success...
The utility model relates to a device to carry out times rotation and separation for an imaging beam in an optical axial plane which is vertical to the imaging beam, and the utitity model is positioned on a 135 camera lens. The device carrying out more times separation and exposure for a...