Yes----I have done extensive optical observation for hour on end looking at the and I can't remember what it is called but the Zeiss optical chart, targets, flowers in a field at different ranges to animals at during daylight and dark and it is a toss up. The scope being discussed here I do not have but I have a total of 4 S&B PMII's 3 Zeniths and 4 USO scopes and they are all so close I cannot tell any difference optically to speak of. I do however prefer the 1/8 MOA adjustments of the USO's tubes that I have. The specific scope that John has I would absolutely love to have on my 1K BR gun if it had 15 more power as it is absolutely World Class bar none!!!!!!!