I am new to auto focus and have found the following - I wonder if anyone can shed any light on it.
I am using the beta version as I believe this had a better focusing routine. When I auto focus I find I get the following difference in my focusing poinn when using different binning methods.
1x1 bin -3921
2x2 bin -3905
3x3 bin - 3906
4x4 bin - 3899
These have been run consectuviely, each using the luminance filter, 8s exposure and 40 steps and at the same temperature. I have found that when the moon is full I am needing to up the binning in order to focus, but the difference here concerns me.
Can anyone explain the difference and why it’s there? I can say that according to the B mask and B grabber the figure of 3921 is accurate. So how can i get accurate focus during a moon?
I look forward to hearing some ideas.