I needed a replacement for my 30 year old Nikon 10x25 binoculars, which were always providing impeccable images until they somehow fell apart. This is my second purchase, the first was a 12x42 roof prism. a model that disappointed because its optics were inferior to Nikon's. I was concerned that there couldn't be anything better than a budget Nikon. My eyes aren't as good as they were 30 years ago, but I can now say that the Occer is a near-perfect Nikon replacement. The image is clear, the focus wheel is light. I don't feel any eye strain, indicating proper collimation and alignment. Just ignore the low light night vision claim, none of these binoculars perform well in low light. These binoculars use a traditional porro (offset) prism design as opposed to the roof prism design used on rectilinear models. Wikipedia has an excellent article on binoculars that explains the design of the two prisms in detail. I recommend avoiding cheap roof prism binoculars; The article details the trade-offs and complexities of a roof prism, which might explain some of the shortcomings of my first purchase. The body of the Occer is plastic but feels solid and well made. I'm just guessing about the durability rating, but with care it should outlive me. I didn't even expect to get binoculars of this quality at such a good price.
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