Hello! As I consider a large Dobsonian telescope, I'm wondering if an Alt-Az system can be combined with an equatorial platform.
I am interested in a large aperture scope for photometry, so I need a reasonable FWHM but not perfectly round stars from corner to corner as astrophotographers need,
Alt-Az Go-To systems are great to find the field; however, field rotation sets in as the exposure progresses. Programs like SGPro allow automatic adjustment of the field based on plate solving an image.
What I have been thinking of is a system that runs on a traditional equatorial platform, but the Go-To is performed with the Go-To Alt-Az motors. Once the Go-To is performed, the Alt-Az motors would be switched off and tacking would be performed by the equatorial platform. The computer would have to do some fancy position reductions with each slew since the "Alt-Az" position would vary as the equatorial platform runs and, while the "Alt-Az" axes would remain perpendicular to one another, their orientation with respect to the earth's axis would be dynamic (though predictable). And, the scope's position would need to be reset each time the Equatorial platform resets.
I'd hate to start such programming from scratch. Has anyone combined an equatorial platform and Alt-Az Go-To System? Thank you.