Optolong Astro Filter

With the development of technology, colorful lights certified city became more bustling. However , it make a big problem for starry fans that many stars and nebular was hidden in lights. People who live in the city was unable to see the clear starry night and to get a image of the milk way. The filter UHC from Optolong(Chinese professional filter manufacturer) is designed for taking images of deep space in the heavy light pollution. UHC can control Na and Hg lamp well to ensure astro objects have enough exposure time. Just so you know, generally we hope exposure time is long enough. But it will be limited by the skylight and glowlight. So use the filtrer to control the background skylight to increase exposure condition. Anti-filter only effects light pollution to reflect wavelenth of light pollution rathr than signal of target objects. it is doesn't matter whether to use filter for exposure of target objects. UHC filtering light pollution meanwhile cuse the Milk Way with ...