Currently using SGP 18.104.22.1688
Using a C14, with a .63 focal reducer, and a Canon T3i.
The factory focuser was changed out for a Feathertouch, and on that, i’m using a Microtouch focus system.
Autoguiding is done on a separate guidescope/camera.
I am taking 3 to 5 second exposures (for focusing) at ISO 6400, which is sufficient for most parts of the sky as far as finding stars. with this focal length, sometimes longer exposures are necessary.
I am NOT using SmartFocus, as this scope has a central obstruction.
I’ve spoken to Starizona, and using the Microtouch/Feathertouch combo, they suggest NO backlash compensation.
I am having a hell of a time getting autofocus to work properly.
I have tried changing the values for minimum star size, steps, and data points.
The closest ive come to this working sporadically is
data points 9
minimum star size 4
I’ve had limited success. The thing that really makes me wonder is, Sometimes I will get a good curve, with the green line, and a 98-100% quality, then it will rack the focuser to a different position, get a worse reading, and fail.
I guess the part that I’m not understanding is, if it successfully finds a good position, why in the heck would it keep trying other positions and then fail?
Does anyone here have the same or similar setup and can provide numbers that work for them that I can try?