Objective diameter:  80 mm
Magnification:  20 x
Exit pupil: 4 mm
Eye relief (acc. to spec): 17 mm
Usable eye relief (measured from rim of eyecup): 16.5 mm
IPD:  56 – 77 mm
RFOV:  3.3  degrees = 57 m
Focus type:  CF
Prism system:  Porro I
Waterproof: splashproof
Weight (measured, with eyepiece cover and strap): 2’138 g
Made in: China


The Opticron Oregon offers very decent performance for a modest price – good value for money, clearly better than the ubiquitous Skymasters from Celestron! Possibly the best of the current low-priced 20×80’s.



see review section of APM MS 20×80 ED,


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