Astrophotography requires focusing everytime you take a photo.
Imperfections in the scope, slight movements in the focuser grearing, atmospheric changes, changes in colour filters, can all cause changes in the focal point especially under large magnification. e.g. one of my telescopes acts as a 1200mm len and at times I use a x5 barlow, making it a 6000mm lens.
Hence my want for autofocus. Autofocus would increase my evening imaging by x10
Imperfections in the scope, slight movements in the focuser grearing, atmospheric changes, changes in colour filters, can all cause changes in the focal point especially under large magnification. e.g. one of my telescopes acts as a 1200mm len and at times I use a x5 barlow, making it a 6000mm lens.
Hence my want for autofocus. Autofocus would increase my evening imaging by x10