About this model it is written that there is a completely new optical system. Maybe it is so. I compared the quality with Nicon Aculon A40. The real difference from the Nicon Aculon A40 is that it has excellent sharpness across the field and around the edges as well, just perfect. And Nicon Aculon A40 has a little bit of distortion around the edges. In the rest - the contrast and brightness are virtually no differences. Both models are great. Therefore, if you need for hunting, for example, or ideal sharpness across the entire field is very important and is also used in difficult weather conditions, then take Prostaff, although outside the eyepieces fog up on any binoculars when it is damp. It is both more compact and lighter. But the price is much more serious. If it's just for general occasional purposes such as surveying the area, etc., then Nicon Aculon A40. The angle of view there is greater, and the quality of the optics and reliability are excellent for this. And the price is 2 times cheaper. Nicon binoculars are the unmistakable choice. You won't regret
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