Cheap h-beta filter, Buy Quality optolong filter Directly from China Suppliers:Optolong 2" H-beta filter for Achromatic refractors
Optolong 2" H-beta filter for Achromatic refractors(All products are original packing.) Note:OPTOLONG H-beta Telescope filter has two kinds of size(1.25" and 2").This is 2" OPTOLONG H-beta Telescope filter. Filter RingDescription96% transmission at 486nm (H-beta).Package Includes1 X 2" OPTOLONG H-beta Telescope filterPicture