![]() WebOptolong Filter Review LRGBSHO Filters AstroFarsography 14K subscribers 3.1K views 1 year ago When using a mono camera, filters are required. Astronomy Filters Optolong Australia īest light pollution filters for astrophotography - AstroForum Optolong filter quality mean Optolong Optics Co.,Ltd. WebFilter substrate is fine-optically polished to 1/4 wave and 90% Blocking range: 300-1000nm Blocking depth: light pollution line …
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