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。
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...
Jellyfish HOO +RGB stars - posted in DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging: This project was kind of a test of my older Canon 300mm f2.8 lens (EF v1, from 1994). Id used it a couple times before and it is quite the light bucket wi
Further, it has been demonstrated that the proteomic profiles of EVs from the same source are dependent on their isolation method [2]. The field of EVs has led to much understanding in the area of cell–cell communication and cancer metastasis, and their use in the clinical setting as ...
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 successively more under-exposed. The pattern of concentric rings will then help confirm what is going on. ...