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Ive been chatting with a guy called Frank Barnes on the CCDWare forum and he had this information about RF and the FSQ.
Hi Monte
I use a RoBoFocus Microstep of 1, a MicrostepPause of 10, and a Duty Cycle of 75%. This is the same for both of my FSQs.
@Focus2 does like to start close to focus. It makes a single pass from inside of focus, through focus, to outside of focus to get the best focus setting. I have found that the following parameters work very well for a FSQ/STL11K and the clear filter :
Samples = 20
Averaging = 1
Focus Range = 400
Subframe Box Size = 100
I found that a Mag 5 star exposed for 0.5 sec. is what is needed in my sky conditions. One thing that I found with @Focus2 that can help it be successful is to experiment and find how long an exposure is required to keep the "out of focus" star at the beginning of the focus run above an ADU count of 800. In my experience, when the star was fainter than that value at the start of the run, @Focus2 usually didn't work. Stay above that value, and it works almost everytime.
Both my RoboFocusers are attached directly to the standard shaft of my FSQs and they are both FSQ-106Ns, not the newer ED model. I don't have a 10:1 focuser on either one. HTH ....
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