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The past couple of nights I had success getting my camera focused in TheSkyX with the camera add-on (CAO) using FocusMax v4 (FM4). My camera is a modded Nikon D610 (which I've renamed the D610A incidentally).
I do have a couple of questions/observations ..
I selected a suitably bright (4th or 5th magnitude star) for FM4 to use. FM4, I think, 'assumes' the imaging camera is a CCD. It will take an exposure of a star, then adjust the exposure time so that its 'flux' is not too high for autofocusing purposes. The reason I think it's CCD-centric in this regard is that, for example, FM4 asked for exposure times like 0.56 or 0.86 seconds. Since the interface exposed by BYN to TSX supports exposures in 1 second increments, I assume that a request like 0.56 is ignored and 1 second is used. Is this correct?
FM4 selects the candidate focus star from an image it takes at the beginning of a focus 'run.' My camera's image dimensions are unnecessarily large for this task and one of the parameters in FM4 is the central CCD Frame size (in percent). I set this to 33%, but, does the interface between BYN and TSX support subframe images?
Despite this, I've examined my subframes from the past couple of nights and they do appear to be well focused.
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