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If you're wanting to go a colour CCD, you can not go past the QHY8/QHY8 Pro. Given the scopes that you intend to use the camera in, the QHY8's 7.8 micron pixels are a good match across all the focal lengths, and the QHY8's spectral response is better than the QHY9 Colour..
Technically speaking, they are relatively equal cameras, your focal lenght and imaging style are really the deciding factors... If I were in your shoes I'd go for the QHY8-Pro. Regulated cooling makes it a better option than the standard QHY8, its smaller form factor also puts it ahead.. The Sony sensors are regarded as the lowest noise in the industry, I used a QHY8 for about 8 months and loved it. Very easy to use, great value for money and the results speak for themselves...
Alex.
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