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William Optics Swan 83 APO Spotting Scope

William Optics Swan 83 APO Spotting Scope

Variable magnification (25x to 75x ) zoom eyepiece. Twist-up Read more

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Specifications

Feature
Value
Comment
features
Innovative
Variable magnification (25x to 75x ) zoom eyepiece.Twist-up eyecup.Good eye relief: 19.5mm(25X)-18mm(75X).First 82 degree Ultra Wide Angle Eyepieces on Spotting scope market.
Nitrogen Filled
Nitrogen filled.Rubberized fit and finish and light weight aluminum construction.
Any Position
Rotatable 360 deg. on its axis for increased ease of use and viewing comfort from any position.Retractable dewshield.
High-quality Lens
83 mm high-quality ED objective made with Japanese Ohara glass.True apochromatic performance. Bright and sharp to the edges.Excellent color rendition for nature viewing .
Rubberized
Green rubberized surface, ideal for outdoors activities and casual bird-watching.
Specification
Objective Lens Die (mm)
83
Objective type
Doublet, Air Spaced, APO
Magnifications
25X-75X
Coating
Fully multi-coated
Field of View (degrees)
42°(25X)-66°(75X)
Field of View
29.5m/88.5ft(25X)
Eye relief (mm)
19.5mm(25X)-18mm(75X)
Exit pupil (mm)
3.3mm(25X)-1.1mm(75X)
Near Focus (m/ft.)
7m/21ft
Length (mm)
560
Weight w/eyepiece (kg/lbs)
2.770/6.107
Release Date
First seen
2 February 2009