Specifications:

Objective diameter:  44 mm
Magnification:  8.5 x
Exit pupil: 5.2 mm
Eye relief (effective, measured from rim of eyecup): 16.5 mm
IPD: 57  – 73 mm
RFOV:  8.2  degrees = 143 m
Focus type:  CF
Prism system:  Porro I
Waterproof: splashproof
Weight (measured, with eyepiece cover and strap): 882 g
Made in: Japan

  

Remarks:

Over the years, Swift Sport Optics of Colorado, USA, has been selling their “Audubon” porro binocular in a number of different versions; this is the latest model, type 820 ED, on the market since 2011. The image with its wide field of view is bright and shows good contrast, the bridge is more stable than in previous versions, and the Audubon rests comfortably in your hand – no wonder this binocular has become very opular with birders.

Ratings:

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Review:

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