Hi Alex. It's interesting to try different methods and think outside conventions. And largely a pig headed decision to persist with a dslr and find ways around inherent limitations.Particularly with older cameras. I just enjoy innovation in cheap kind of way - DIY.
Martin image scale as in the attached screenshots. Of course this is affected by seeing. FYI - the most suitable camera for proper sampling with my widefield setup is akin to the 183M/C ZWO or QHY. Pixel pitch 2.4um..
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