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Swift Optics 820 Audubon 8.5x44

Manufacturer data

Manufacturer:

Swift Optics
web site

Distribution / Sales:

Migomex
web site
Specifications
Manufacturer Swift Optics
Model 820 Audubon 8.5x44
Lens diameter [mm] 44
Magnification [x] 8.5
Angular field of view [deg] 8.2
Linear field of view [m/m] 144/1000
Exit pupil [mm] 5.18
Eye relief [mm] 17
Min. focusing dist. [m] 3.3
Twilight factor 19.34
Brightness 26.8
Prisms BaK-4/Porro
Dimensions [mm]
Weight [g] 697
Waterproof Yes
Nitogen filling Yes
Argon filling No
Image stabilization No
Tripod exit Yes
Focusing central
Warranty [years] 25
Accesories
Price 1219
Additional information
Average rating (2 owners reviews)
Build quality
Optical quality
Accesories and usage
Value for money

Overall

4.13 Good
Owners reviews (2)
  1. Joe
    Joe 4 September 2016, 18:28
    Build quality
    Optical quality
    Accesories and usage
    Value for money

    Overall

    IP 68.8.x.x
    Owner since: more than 10 years
    Price: $250
    User profile: Amateur

    Cons: Bit heavy. Eyecups are clumsy. Eye relief could be better

    Pros: Resolution, huge wide view, color and contrast

    Summary: These make great birding or sport viewing binoculars. The view is very relaxing and it is easy to catch moving objects. The outer portion of the view not sharp, but is more than made up with terrific resolution in the center.

  2. Moynihan
    Moynihan 24 November 2011, 00:08
    Build quality
    Optical quality
    Accesories and usage
    Value for money

    Overall

    IP 96.40.x.x
    Owner since: 7 years
    Price:
    User profile: Amateur

    Cons: Occular bridge has some flex.

    Pros: Resolution, clarity, contrast.

    Summary: Matches most alphas optically, but not in fit/feel/build. Amongst porros, optically surpassed by the Nikon 8x32 SE, but everything else is surpassed by them also. Build quality is for me, not as good as the pre-armored versions in this line.

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