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Lens length for afocal digiscoping with APS-C sensor DSLR (1 Viewer)

Angus W

New member
I have a endeavor HD 82A scope, and am thinking of getting the PA-202 adaptor for digiscoping with a Nikon APS-C camera (D5300).
Presumably a fast fixed focal length camera lens would be the better way to go, with zoom available via the eye-piece on the scope, but...
What lens length on the camera will work well with minimal vignetting?
(or is vignetting essential unavoidable this way - and I will have to accept the need for digital zoom/cropping?)
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