As I work through my various problems and sort out solutions for adapters, thread sizes, back focus distances, and not to mention eventual imaging cameras, sizes etc.. I keep banging up against the concern for vignetting... specifically being that I don't want to introduce an unintended baffle in my image/observation train, which will rob me of photons.
So my first question, given any refractor, how do I figure out light cone diameter, for any particular point along the back
And then the second question being, does every eyepiece which does not match field stop to light cone, essentially stop down the light gathering? (edit: thinking about this while I'm waiting for the knowledge to come in, I'm feeling increasingly stupid LOL).
Edited by Simcal, Yesterday, 10:32 AM.