Hi,
As a newbie I'm trying to achieve focus and thought perhaps best to do this during the day against some rooftops.
With or without filters it's completely white image.
Focal Length 420 on 72ed.
Gain M = 100
setup includes ASI AIR running live video, focus or exposures.
Skywatcher 72ED
Reducer for 72ED
MFW
ZWO533MCPRO
sitting on star adventurer2
Also a Guide Scope 50ED
Reducer for 50ED
ZWO 120 MM Mini
I understand I need to first achieve back focus which is either 55mm or 56mm. I've tried a number of adapters but the image is not focused and becoming very time consuming any help is much appreciated.