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Swift Sport Optics

Swift Sport Optics 8.5x44 BWCF Audobon ED, Water Proof & Rubber Armoured Porro Prism Binocular with 8.2 Degree Angle of View.

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$632.00 List Price

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$506.73 $20 per week
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About the Swift Sport Optics 8.5x44 Porro Prism

Designed by birders for birders, the 820 Swift Audubon took over two years in the making with valuable input from leading birders across the country. The results? A birding binocular that exceeds all expectations. And still at an affordable price.

The Swift Sport Optics 8.5x44 Porro Prism is commonly used for Bird watching and more.One reason why the Swift Sport Optics 8.5x44 Porro Prism is popular is because of its Quality lenses.

Summary of Customer Reviews

Customers most agreed on the following attributes:
Quality lenses (4)
Best Uses:
Bird watching (4) , Wildlife viewing (3)
Reviewer Profile:
Avid adventurer (2) , Casual/ recreational (2)

Swift Sport Optics 8.5x44 Porro Prism Features

  • Wide-angle, close-focusing
  • Ergonomically designed for ease of use
  • Waterproof, armored
  • 5 lens ocular system, Bak-4 prisms
  • ED Extra-low Dispersion optics

Swift Sport Optics 8.5x44 Porro Prism Specifications

Type of Prism Porro, BAK-4 prisms
Coating Multi-Coated Lens
Real Angular Field of View 8.2°
Field of View at 1000 Yards 430'
Exit Pupil 5 mm
Eye Relief 17 mm
Relative Brightness 25
Twilight Factor 19.3
Close Focus Distance (ft) 10'
Rubber Coated (Armored) Yes
Waterproof / Fogproof Yes
Dimensions 5.7" Height
Weight 25 oz.
Special Features ED Glass
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