Tips to get started with digiscoping?

[turboscrew]

I wonder if I could find some beginner's tips about digiscoping somewhere?

I was planning of trying Mars through my 12" F/4 tube.

How do I find some good starting values for the camera settings? I have Canon A590, and it has manual mode. I also have CHDK for it.

I could try with partly automatic, but because the camera won't show what values it has chosen, I wouldn't learn a thing that way.

 

[turboscrew]

I found this: https://www.saao.ac.za/~wpk/exposure.html but I think the 'K' here is actually L/C, where L is target luminance and C is equipment specific(?) "calibration constant".

I wonder if I'm getting closer?

I also wonder if I can find (average) luminances of planets somewhere?

 

Edited November 6, 2020 by turboscrew