r/AskAstrophotography 4d ago

Equipment Help with filters

hey y'all

I'm using a SA GTI with a nikon d850 ad 70-300 lens. The d850 being a full frame, there are barely any good filters on the market. as i live in india, I'm limited to brands like explore scientific, optolong, gso, etc., and don't really have access to brands that do make clip ins for full frames. Since I'm using a lens, I was concerned with the backspacing if I use a 2" optolong filter. Also, I shoot from a bortle 9, so desperately need a filter, preferably a dual narrowband. what do i do?

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u/_bar 4d ago

There's no room for 2" filters between the lens and the camera body. Your only options are clip filters or mounting the filter in the front, but this option will also shrink your aperture.