David Tate created a new topic ' New Attempt a Focusing' in the forum. 1 year ago

Ok, after a few attempts at auto-focusing (AF), I'm going to try only AF on the Lum filter and using the offsets found on the initial Bahtinov mask focus.

What I'll do since I only have been imaging with my Ha/Oiii filters, I'll have one Lum image stuck in between the others at only 1 sec just to get the AF to activate on it and let the offsets take care of the others. I've found that using the Bahtinov on the 1# filter (Lum) that the others rarely need to be changed... maybe by a very small amount.

But the AF on the Ha/Oiii just seems to not nail it.

Read More...