Optolong
Nikon DSLR users rejoice! You can finally buy clip filters for your D5000 or D7000 series cameras, and get spectacular results with Optolong quality astrophotography filters! Besides a selection of Nikon and Canon clip filters, Optolong offers a wide variety of mounted and unmounted astrophotography filters including H-Alpha, H-Beta, OIII, SII, LRGB, UBVRI, IR Pass, UV-IR Cut, L-Pro, UHC, CLS, OWB, and more.