I think I am getting to grips with CCD as opposed to DSLR imaging, attached is a 16*240s shot of M20 with the 335 attached at prime to the WO66. I have pushed it a little to hard I think but the result is pretty pleasing for such a small scope.
Calibration/Stacking/Colour Synthesis in AA4 with levels in PS.
Making progress John. It can be a step learning curve at times. Your image looks black clipped, so suspect you've lost some data in the fainter regions. Perhaps a quick reprocess would see an improvement. Look forward to seeing more.