A unified theory: Exit pupil aberrations and Eye position, types of image blackout (1 Viewer)

[Maljunulo]

Its the synergy of physics and biology that I enjoy around here! The nature side keeps theoretical stuff in perspective and relevant. In an astro forum its usually just a case of bigger = better.

For very good reasons, it is not just a blind pursuit of “bigness”.

 

[bsantini]

The effect of horizontal misalignment feels pretty similar to eye rotation related misalignment but I haven’t investigated it thoroughly, what do you think?

Besides SAEP and prism vignette, there are other uncommon or minor pupil aberrations which I don’t know enough about to evaluate. Eg i am yet to see chromatic aberration of exit pupil, possibly because it is so disturbing that designers absolutely avoid it?

Your pupil must be centered in the exit pupil. Otherwise your eye’s smaller pupil might sample the beam (really the objective) at a point nearer it's edge, which also stops the objective down, but in an area where the objective’s F ration is fastest, and possibly most subject to showing charismatic aberration.