Opticron Oregon 20×80

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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
AFOV (measured, rounded): 55.5 degrees
Minimum focus distance (estimate): 35 m
Focus type: CF (direction of rotation from close to infinity: < anticlockwise)
Range of diopter adjustment (acc. to spec.): +/- 4 dpt*
Excess travel of focus wheel beyond infinity position (estimate): 6 dpt*
Prism system:  Porro I
Waterproof: splashproof
Weight (measured, with eyepiece cover and strap): 2’138 g
Made in: China
*range of diopter adjustment not affected by position of focus wheel


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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