first, thx for your awesome site, it’s really pleasent to use :)!!
One thing that’s currently strange in the telescope-simulator for eyepices is the handling of different FoV for eyepices.
Eg. for a 100 deg. eyepice the image actually get’s a lot smaller compared to looking through the real eyepice, instead of showing more.
That’s because the green ring does not change in size, when IMHO in reality for eyepices 50deg. vs 100deg. the size of the green FoV area should be increased and not the bigger FoV scaled down and fitted in the same FoV actually making the image apear much smaller than it really is.
I hope i could describe the problem with the current handling of FoV that it’s understandable, if not maybe this image helps: