I’m very interested in the focusing ability of SGP. In particular how it manages to focus without slewing away to a focus star. I understand that it looks at FWHM values over the entire image which i principal sounds like a good approach. However, I can imagine there might be situations where this might have complications such as a naturally curved field of a refractor without a field flattener, or imaging a subject such as a globular cluster dead center. Does SGP have any way to compensate (if necessary) for such situations?