 | Swift 8.5x44mm BWCF Audubon Birder Waterproof Binoculars |
| Back to Order Page | Print This Page | SKU: SF-BI-Audubon-820 |
Swift 8.5x44mm BWCF Audubon Waterproof Binoculars 820 is Swift's premium choice in porro prism birding binoculars. 
An 8.5x power 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
In addition to Swift 8.5x44 BWCF Audubon Birder Waterproof Binoculars, make sure to check other Swift Binoculars and other Swift products offered in our store.
| Swift 8.5x44mm BWCF Audubon Birder Waterproof Binoculars | Audubon-820 |
Order Swift 8.5x44mm BWCF Audubon Birder Waterproof Binoculars from http://www.opticsplanet.net/swift-8-5x44mm-bwcf-audubon-waterproof-binoculars.html