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For the price these are excellent binoculars. I tested these against the 8x42 monarch 5, monarch 7, vortex vipers, diamondbacks and razors. I returned all, other than the razors (10x42) and these. I thought these performed in low light conditions comparably to the vipers and monarch 7’s both of which are almost double the cost. The razors blew all of them out of the water (but at $1000 I expected this). All binoculars tested were excellent in bright daylight conditions. The real test with binoculars is at low light (dawn/dusk or very overcast/rainy day). These did very well for the price. I had no problem id’ing small quick moving songbirds in dense brush at dusk. They didn’t perform as well for ID’ing waterbirds in the ocean or flying raptors against a blue sky (or really any flying birds for that matter). But then again none other than the razors could pull colors and definition from those birds at a distance or in flight. I am going to keep these for songbird viewing (and the razors for seabirds/hawks) and eventually save up for a high end 8x42. Great set and worthy of the best in class ($100-300) on audubon binocular guide.
I bought these primarily for birding. They have been fine for their intended use, but I can't say I have been wowed. They take a view of a bird already in view and make it somewhat larger and more defined. There haven't been any cases in the 1-2 months I have owned these where I have thought I'd never make the ID without these. However, in addition to birding I have used these for astronomy (Jupiter/Saturn conjunction the latest) and also for terrestrial viewing. In those capacities, especially the latter, they have been really great with a wide field of view, quick focus, and clear image. When I first tried these I hated them. I often had problems with collimation. I realized after use that the issue wasn't the optics but with me. Once I had them the way I liked/needed them for my less-than-perfect vision they have been great. I bought these for closer to $200 than $300 after various discounts. At $200 I'd buy another pair. At $300 I might consider something else, but if you want a pair of comparatively cheap binoculars for every day use take a long look at these. I am pretty happy so far.
For nearly $300 you'd figure that these binoculars would have clear crisp edge vision but I found that this was far from the case with this pair. I purchased this based on reviews here and elsewhere but I can tell you that the edge vision is poor and the clear focus area is too small for this price point, at least for the pair I got.
I purchased these binoculars because they were the ones used on the Cornell University ornithology website. When you spot a bird it is easily found in the binoculars when raising them to your eyes and they allow a large amount of light in. Lightweight and easy to adjust and focus.
Took it on a vacation and used it to view birds and animals in forests. I am wowed by the clarity and colors of the magnification. It was also very easy to focus and adjust. It did not fog or lose quality after getting wet.
It would take an ultra keen eye to distinguish subtle variances from these mid-range binoculars to premium brands. Brightness and clarity are outstanding. These Trailseeker HD 10x42 will be used primarily to locate wildlife for photographic purposes especially during early morning and evening hours. In this capacity, they have performed exceptionally well. For my casual needs, there's little benefit to obtain top of the line optics for slightly marginal visual improvements.
I bought these as a back-up, easily carried and primarily for bird-watching; using them for everything; can focus on imagery 6.5 feet away to infinity; very happy with them would recommend; own other Celestron telescopes (5. 5 inch refraction) happy with them as well; good optics.