Quote:
Originally Posted by h0ughy
to me it looks quite simple - the lens is not orthagonal to the imaging plane. how you fix that - no idea but when i was using the 127 i bought a hotech field flattener which worked wonders as it was self centering. For this you might need to get an adaptive collar that is correctable - the qhy10 came with one (not that i have used that the camera is still BNIB) http://www.gamaelectronics.com.au/QHY10.html if you look here you can see it here. maybe you can get something like that to correct for the imaging plane
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You're right there is some tilt but it is mainly coma as it radiates away from the centre in all 4 corners with the bottom left being the worst where there is also tilt.
If you stop down and use 2x2 binning you may be surprised.
I doubt these things are made to the same standards as astronomical telescopes. They are mass produced in a factory.
Greg.