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FWIW : Although not really billed as a DSO imaging camera the little LP-Guide colour camera can be used quite effectively for entry-level DSO imaging. Attached is a recent acquisition of M83 taken with a very low cost f/5 5" Newt. 4 x 4 minutes unguided exposures. The only calibration was the automatic subtraction of a dark frame during capture. Stacked with RegiStax and mildly processed with Photoshop. Not brilliant but would probably satisfy a starting imager, particularly as the camera is as cheap as chips. Unguided exposures do require the mount to be pretty accurately polar aligned.
David
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