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I think I have figured out a problem but I can't see any solution.
My Sesto Senso autofocuser seems to be the issue. It has lost its way and doesn't know where it is anymore.
I calibrate it (on three different computers just to be sure) and the settings are 0 to 135143 (give or take a few numbers). So 0 is as far back as the focuser will go and 135143 is as close as it will go. 66000 should be half but it is not. I put the setting to 100 but it firstly ends up on 10 mm (instead of around 0 mm) on the focuser scale and then if going back to 66000, it is no where near half way and if I go to 100 again, it ends up about 18 mm on the focuser.
So it is to blame. When I changed the focus trying to get focus, it kept losing the area towards 0 (extended fully). So 100 was about midway in the focus length. It just (obviously randomly) seemed to happen when I put the 16200A on my mount. I was not able to use half of the focus.
Just one more set back in a comedy of errors with the 16200A. I have to see if it can be completely reset back to factory default.
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