Quote:
Originally Posted by raymo
The elongation is all in one direction, and worse in the lower right hand side, leading me to think that your camera is not absolutely perpendicular to the light path.
raymo
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It is also likely to in part be the 0.67x reducer, the RC will natively have field curvature if uncorrected, having a reducer will make the situation even worse. It may be slow without the reducer but you'll get much better looking stars.