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I'm reading up about those RACI finders, sounds like often employ fine adjustment screws, cross hairs - ie. just made for image finding during computerised photography. Thanks for the valuable tips!
PS: another stoopid question... I believe the general rule of thumb for optimal f/ number is about 5 x the camera pixel size (microns). With the ASI224MC planetary camera (3.75 microns) that means ~ f/19. For the ASI294MC Deep Sky camera (4.63 microns) that means around ~f/23 is optimal. All other things being equal, does that also mean that the final image will/can be bigger with the ASI294MC camera?
Fox
Last edited by Fox; 01-09-2020 at 11:28 PM.
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