btw I was wondering about attaching the 1.25" nosepiece with the SA100 to a T-ring with my full spectrum modded 400D (which has both UVIR and anti-alias filters removed) - I suspect that this camera has a wider spectral response than the QHY5, as well as having a wider FOV, less noise, 12 bit ADC, and the ability to capture longer exposures.
However using the
RSpec calculator it tells me that my resolution will be 7A/pixel with this setup. Is this too small? The two scopes I would be using are a Vixen VC200L at f9, or a 80mm f6 refractor