I have looked through the 50mm Razor a lot and have a few comments, hope I don't get sidetracked from your original question. First: 50mm scopes are limited but they can be useful. I have the Nikon ED 50 and it preforms well and I have taken it up the mountain and compared it side by side with my 65mm Razor. The Nikon is far superior, which says a lot considering the objective lens size. The only time the Nikon slips is the last little bit of light and then the 65mm Razor did better, but still not as clear. I think there is a big difference in quality between the 65mm Razor and the 50mm Razor. It seems the quality of glass should be equal since it is the same optic however I notice significant edge quality issues with the 50mm Razor that I don't see in the 65. I would not buy a 50mm scope that didn't have great clarity and think the Razor 50 wouldn't be good enough.