Resolution 32 vs. 50 (1 Viewer)

[Dennis Mau]

Did I miss something - have you taken a job with Zeiss?

No, but I asked Zeiss that question. And it was answered by one of their optical engineers.

 

[Dennis Mau]

Not due to theoretical principles like the Dawes limit. But in practice, when your 2.x mm daytime pupil is stopping down a 10x50 to half its aperture, the center of that objective may perform a bit better than that of a 10x32, as Binastro mentioned back in post #2...

The Zeiss Optical Engineer said the 10x50 and 10x32 would have the same resolution, but I understand what you are saying. Henry said the same thing when he tested the Zeiss 8x56 FL compared to the Zeiss 8x42 FL. He said the Zeiss 8x56 FL had higher resolution because you are using the sweet spot of the objective lens, which eliminates aberrations that are found at the edge. That sounds like a reasonable theory.