Very interesting, so I guess my thinking "a larger FoV is always better, even if not perfectly sharp to the edge" is based in fact. And as long as moving the binoculars and not rolling around the eyes in the FoV -- the bluriness of the outer field wouldn't even matter, right?Yes, that's what it means. The sharp field of view of human vision is only 0.5 to 1 degree wide depending how strictly you define sharpness. This means, in your typical binoculars with 60-degree apparent field of view, only 1/3600 of the visible area is seen sharply at any given time!!