I just got my Viper HD 10x42 and have spent the last 3 hours sitting outside and convincing myself that it is better than my Diamondback HD 10x42. Unfortunately, I don't see any significant improvements. I'll start by believing that you get what you pay for and that quality doesn't come cheap. I value quality and am willing to pay extra for it. I'm an amateur photographer and have thousands of dollars on fast f/2.8 pro lenses. I understand the importance of quality glass in a lens. The Viper HD definitely comes across as high-quality. Compared to the Diamondback HD, they seem to be more durable. You can tell they used the best materials and probably the best glass. The eyepiece lenses are thicker than those of the HD Diamond Back. Unfortunately, that's where the praise ends. Image quality is excellent, with very little chromatic aberration and only slight cyan and magenta fringing at high-contrast edges. An obviously frustrating problem is just that. Glare. The huge cluster of ocular lenses is highly reflective and easily reflects light that bounces off my eyes or seeps through the gap around my eyes. It's not as noticeable in very bright scenes, but if you're looking at a shadowy area with something bright next to or behind you, there will be flare in the image, degrading image quality. With my Diamondback HD this is absolutely no problem. The Viper HD is in dire need of large, sealed rubber eyecups. As if the eyepiece lens were a large crystal ball that collects light from all directions. I have tried to show the difference in my pictures. You can clearly see the large reflections on the edges compared to the Diamondback. In general, internal reflections are a problem. Especially if I don't have anything with the cheaper Diamondback HD. Another problem I'm having is that the stems don't seem to align properly. Even when I adjust the diopter for the right eye, there is something wrong with the fine detail resolution. It's like my eyes are straining to put two images together. I may have caught a broken pair of binoculars, but it's definitely going back. Even without annoying glare and slight eye strain, the difference in image quality isn't worth $300 (150% more) than the Diamondback HD. I want the same build quality. It wouldn't be hard, but even after typing all these questions I'm still trying to convince myself to keep the "nicer and more expensive" model. Unfortunately, the negative aspects outweigh the negative ones. On the other hand, I save $500 since I already spent $220 on the Diamondback HD.
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