The Canon Binoculars »15x50 IS UD 4.5 ° ALL WEATHER" is fine, but the eyecups are a disaster. I adjusted the viewing distance according to a manual (in my case 60 mm). Even the first durchgucken was unpleasant: the relatively hard, narrow edges of the eyecups are only at two points on (eyebrows and nose), after a short time it is no longer fun look through, the pressure points are troublesome. Unlike my other binoculars, as I can without pushing something close to the eyes, by looking with pleasure long. But the "15x50 IS" it gets worse: this eyecups limit my field of view, because by their length my eyes are too far away from the eyepieces! I have the mussels reclines to use the full field of view, although I do not wear glasses! Probably never a charge of something Canon-man has looked through this glass. But if you use it with folded-back eyecups, you have joy. The picture to the brim clear and bright and with activated image stabilization is the image quite calm, even when panning. Glass is relatively heavy, but fits comfortably in your hand. This puts my very good "10x50 Carl Zeiss Jena" in the second row: the best is the enemy of the good.
