Many people equate focal ratios with image brightness, but strictly speaking this is only true when taking pictures of "extended" objects like the Moon and nebulae.
Brightness uniformity and true color calibration Date download and save pixel by pixel.
亮度均匀度，色度真实度矫正数据产生、分析、保存和下载。
3
Travelers from all over the world carry their unique brightness and gather at LuminTree to celebrate the true cosmopolitan meaning of Lantern Festival.