Quote:
Originally Posted by peter_4059
I chone the ASI120MM for the small pixels because I wanted to use a lightweight mini Borg as the guidescope. That has a fl of about 250mm so I'm guiding at about 3 arcseconds per pixel. My main imaging combination works out at about 1 arcsecond per pixel. I was thinking binning the guide camera woulld not be ideal in my case.
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Sorry - thought you were the OP. The OP was talking about using the ED127 as a guide scope. It has a focal length of 950mm