Finally getting my C8 a workout.
Eta Carnia Keyhole nebula:
C8 @F10;
Canon 450D (non mod)
10 x 5 min ISO800;
10 x 5 min ISO400;
20 x 5 min darks, ISO800 & ISO400;
No flats;
G11, tracked with WO 70ED & QHY5.
Stacked in DSS, curves/levels & sharpened in CS2.
Well, it's not the worlds best, but it's my 1st real attempt with the C8. I really need to take a step back & buy & learn on a 6.3FL reducer before attempting F10 shots. A FL reducer will help with star elongation & I need flats to remove sensor motes. Tracking is OK but the focus is slightly soft.
Also the 450D is over sampling the stars.."a lot"...at around .57" per pixel. Not much I can do about that....but I really need to mod this camera filter
I have a GSO SCT focuser fitted & my guess this adds some extra FL to the image scale.
The attached pic shows star artifacts from compressing the image to a smaller size & lower resolution.
Well...if nothing else it's a start with the C8.