Does anyone not wearing glasses find this spec useful when evaluating binculars? I do not.
To get a good clear view without vignetting/kidney beans the shape of the eye cups and their extension seems more important and that has no specification. So trying the binocular is the only way to see if they fit your face and eyeballs?
Some models seem to need one more click of extension to get a clear view without holding the bino off your face. On birding forums I have seen MacGyver methods to add extension but it seems that listing eye cup extension might be helpful for prospective buyers.
To get a good clear view without vignetting/kidney beans the shape of the eye cups and their extension seems more important and that has no specification. So trying the binocular is the only way to see if they fit your face and eyeballs?
Some models seem to need one more click of extension to get a clear view without holding the bino off your face. On birding forums I have seen MacGyver methods to add extension but it seems that listing eye cup extension might be helpful for prospective buyers.
