Just came to my mind...simply out of curiosity. I wonder whether there's any difference in size of eyepiece lens and eyecup between NL 32's & 42's. Similarly, EL SV 32's, 42's and even 50's. Difference between CL pocket & NL 32 is evident, but wondering whether once 32's or larger do they remain just about the same or get proportionally larger as well???