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Robert, not seeing any "informed" replies so I'll chime in with what little I know. The issue about UV filters for refractors vs. compound scopes would not apply to an AP refractor. My FSQn had terrible blue halos around bright (blue'ish) stars. The New-Q's apparently fixed that. This would NOT be an issue for an AP scope tho.
My vote is you do not need a UV filter.
They say the sensor on the ZWO ASI2600 has an IR Cut filter. I took it to mean it is just IR and not UV also so I use the IR-UV filter. I would like to know if anyone knows if an IR Cut filter is all you need with a refractor or if you also need the UV part. My understanding is that you only need these filters with a refractor but if you use a catadioptric scope with a field flattener or tele-compressor that the glass elements of those additions also require it. I would love to not use the extra filter. My FSQ definitely needs a filter for bright stars.
Does anyone know the story here?
I have been thinking about getting a ZWO ASI2600.
Do you actually need a UV.IR
filter to add potential reflections? I thought the glass cover for the camera provides UV/IR protection.