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I hear you but I'm nowhere imaging at 3M FL. My usual FL is under a 1M. The QHY9 would give me a smaller sensor so less problems with the field illumination and aberrations. Smaller pixels too and mono so no loss of resolution when debayering. My image scale varies between 2.5 to 3asp with a pixel size of 7.8um for the QHY8. If I can get down to 5.2um I should get some good lum details with the same gear.
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