Last night I attempted to find the focal offsets for each of my filters, L,R,G,B,Ha,OIII and SII and I got strange results…
My method was to use a Bahtinov mask to get L pretty much perfect and then I ran auto focus for each filter concurrently in the order above, each time noting the position given, which is in the table below. The temperature readout from the sensor on the focuser stayed at 12.5 degrees Celsius. I have also added the offsets. As you can see they are all over the place.
I have a feeling that backlash may be the issue, I don’t know how to counteract this though, I have read several posts and am none the wiser. I have included screenshots of my settings in SGP.
Another thought is that my method may not have been the best, should I have focused L each time for every filter? For example L and then R, 4 times in a row?