"I received the Vortex UHD 8x32, and it is a nice binocular, but the Nikon MHG 8x42 has sharper edges, it was brighter in low light, has less glare, it has easier eye placement, and it was only 2 oz. heavier, so I returned the UHD and kept the MHG. IMO the UHD has quite a bit of fall off at the edges as Allbinos said. It also has some NL like glare at the bottom of the FOV at times. Furthermore, it had considerably more CA than the MHG, so it was an easy decision with the MHG being almost $500 less expensive. The FOV of the UHD at 9 degrees does not seem that much larger than the 8.3 degrees of the MHG, so I wonder if it really is 9 degrees. It doesn't seem nearly as wide as the NL 8x32. Part of it is that the edges on the MHG are sharper, so the FOV seems larger. The UHD 8x32 is a nice binocular, and you might prefer it, but my preference was for the 8x42 MHG. I returned the UHD 8x32."
It's not a big secret that I've always liked Vortex Optics very much and for several reasons. First of all, their sport optics line-up is very rich; second, their products come with a wide range of prices ...
www.allbinos.com
"With such significant fields of view, I didn't expect them to be corrected in a perfect way. On the other hand, if the new Razors are supposed to compete with the best, they should be devoid of too many compromises. Unfortunately for the Vortex, there are a lot of compromises here. First, you can spot immediately the decrease of sharpness near the edge of the frame. In the 8x32 model it appears near 3/4 of the distance from the center, while in the 10x32 model is visible even earlier. Distortion is even more noticeable closer to the center of the image. In both models there is a noticeable coma that appears around 70-75% of the field of view radius, and at the very edge it is on the borderline between medium and high levels.
To sum up, I don't doubt that the new Razors UHD won't be a serious threat to such instruments as the Swarovski NL Pure or the Zeiss Victory SF. I can even say more: I suppose they will have serious problems to compete even with lesser models of Swarovski and Zeiss from the CL Companion, SFL, or even Conquest HD line. Still, I also hope that our disappointment connected to the 32 mm Razor UHD instruments will be soon sweetened up by small and shapely Razor HD 8x30 and 10x30 devices, moderately priced on a level of below 1000 USD."