shinken wrote: Hi,

I've been working out autofocus with my ZWO EAF + ZWO ASI183GT + TS 76EDPH scope but I am having some issues.

1. Algorithm: I have tried many combinations. Autoselect start and subframe works fast using SEP and iterative and works well while I am paying attention and manually start from a good rough focus but left alone during an automated sequence it fails. Full field seems to work better when left alone with a step of 25 if focus is close to correct but sometimes it goes off in the wrong direction, loses focus then fails to detect stars (because of going completely out of focus) and it aborts the sequence. Any suggestions as to what algorithm, initial step size, etc.?

Thanks in advance for your help.