Maxpixel wrote:
Still waiting for Canon to produce a best in class astro lens, such as the Sigma 20mm f1.4 DG DN, with special attention paid to eliminating coma (bat wings) in the periphery, or at least let Sigma put an Rf mount on it so I don’t have to buy a Sony camera to use that lens.
Just went to NEAF and there were a lot of cameras for scopes. Much better then a lens giving you coma. Are you trying g to do wide field?