I just bought the ASI294MC (non cool) and I would like to know what is the back focus required with my Celestron Evolution 8. Can I use the camera directly with my diagonal? or my visual back? I know that the ASI294MC Pro came with some extender ( 21mm,16.5mm and a M42-48 adapter). Should I use the same adapters? Also if I use a f6.3 focal reducer what will be back focus required? Please advise
