Optolong
Optolong Optics Co. ltd. is a manufacturer of astronomy filters, fluorescence filters. Optolong also offer other interference filters like UV filters, visible filters and Near inferred filters, beam splitter, anti-reflection coating and optical mirrors as a OEM service.
Optolong Kit LRGB 36mm
US$ 235.06Optolong Kit L-RGB 2" (50.8mm)
US$ 287.48Optolong L-Ultimate 2" Filter
US$ 339.92