Nikon Prostaff 5 10x50
The new Prostaff 5 series, produced by Nikon, was launched in July 2013; it consists of four roof prism models with the following parameters: 8x42, 10x42, 10x50 and 12x50.
low physical weight for the 10x50 class; good quality prisms made of BaK-4; sensibly corrected coma; moderate brightness loss on the edge of the field of view; good whiteness rendering; sharp image across almost all field of view; small flares near exit pupils
not especially impressive transmission; huge chromatic aberration; noticeable distortion; significantly truncated right exit pupil; no coatings on some air-to-glass surfaces; the interior of tubes leaves a lot to be desired; no tripod exit