[wayne anderson (Wayne)]

5x3 min subs iso1600
20x30sec subs iso1600
30x10sec subs iso1600

30mins total

Meade 12inch LX200GPS (f6.3, alt/az setup, de-rotated)
Sony Nex 5n DSLR (full spectrum modified)
Processed with DeepSkyStacker and Startools

I noticed my zero shift focuser was not centered and angled properly causing the camera to be tilted and giving egg shaped stars so i laser aligned the focuser and gained good results.

However on the very extreme edge of field stars are triangular and show a radial pattern with flat edge facing the centre of image and point facing away, i am using a Meade f6.3 field flattener/reducer, could this be over or under correction of the field flattener and be fixed by adjusting spacing, or is this something else, any thoughts on this?

Thanks, Wayne.