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Swift 8.5x44 BWCF Audubon Birder Waterproof Porro Prism Binoculars, Black - 820
$329.49 $502.00 Save 34%
Code: SF-BI-Audubon-820
MPN: 820
UPC: 790401008209
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Swift 8.5x44mm BWCF Audubon Birder Waterproof Binoculars Product Info

Swift 8.5x44mm BWCF Audubon Waterproof Binoculars 820 is Swift's premium choice in porro prism birding binoculars. An 8.5x power binocular is a great compromise between the classic debate of magnification, size and exit pupil diameter. You'll have an exit pupil diameter of 5.1mm, great enough for viewing in nearly all birding situations, and a very wide 8.2? angle of view for an 8.5 magnification binocular.

Specifications for Swift 8.5x44 mm BWCF Audubon Birding Waterproof Binocular #820:

Prism Type: Porro
Magnification: 8.5x
Objective Diameter: 44mm
Angle of View: 8.2°
Field-of-View (@ 1000 Yds): 420' (139 m at 1000 m)
Minimum Focus Distance: 10.0' (3.0 m)
Exit Pupil Diameter: 5.2mm
Eye Relief: 17mm
Relative Brightness: 26.8
Twilight Factor: 19.3
Focus Type: Center
Weatherproofing: Waterproof & fogproof
Tripod Socket: Yes
Dimensions: 7.6 x 5.5 x 2.8" (194 x 139 x 71mm) WxHxD
Weight: 1.72 lb (780 g)

Features of Swift 8.5x44mm BWCF Audubon Waterproof Binoculars #820:

  • Broad front distance between objectives gives phenomenal depth perception
  • BaK-4 Porro prisms for a wide viewing field and a broad depth of field
  • 5-Lens eyepiece system

Package Contents:

  • Swift 8.5x44mm BWCF Audubon Waterproof Binoculars #820
  • Case
  • Strap
  • Caps
  • Lifetime Warranty

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Swift 8.5x44mm BWCF Audubon Birder Waterproof Binoculars Comments

Customer Reviews
Helpful Positive Review I love these binoculars! by Legacy Reviewer, June 10, 2012
I'm kind of an afficionado and have five pairs of binoculars. For birding and general usage, these Swift 8.5x42 are the ones I always bring with me and use. The wide field of view is wonderful for keeping track of birds on the move. Porro prism gives...
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