Re: Vortex Binos?
Field and Stream (which Vortex hasn't advertised in) had this to say about the Vortex Viper!
Best Of The Best Winners
Vortex Viper 10x42mm (Top)
$610
800-426-0048
vortexoptics.com Based in Wisconsin, Vortex has been marketing its own line of optics since the late 1990s, and the Viper 10x42mm is one of the company's very best. It has features similar to those of the Brunton (below), including a piano hinge and locking diopter adjustment ring. It even has screw-out eyecups that, happily unlike the Brunton's, only screw out, not off. The high magnification does restrict exit pupil, but the BaK-4 glass prism keeps those pupils full and round, and you get a higher twilight factor for making out details. There's sufficient eye relief for even eyeglass wearers, and the resolution is exceptionally good, with virtually undetectable spherical aberration. All in all, this is the right size and weight package at the right price.
Weight: 26.5 oz.
OAL: 6"
Width (with hinges closed): 41⁄2"
Exit Pupil: 4.2mm
Eye Relief: 16.5mm
Fov: 320' @ 1,000 yd.
Twilight Factor: 20.5
Waterproof-Fogproof: Yes
Resolution: Exceptionally Good
some more info for you
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