Objective diameter:  35 mm
Magnification:  7 x
Exit pupil: 5 mm
Eye relief (acc. to spec): 14 mm
Usable eye relief (measured from rim of – unfoldable – eyecup): 7.5 mm
IPD:  53 – 75 mm
RFOV:  10.0  degrees = 175 m
Minimum focus distance (measured): 5.0 m
Focus type: CF (direction of rotation from close to infinity: < anticlockwise)
Degrees of rotation of focus wheel from 5 m to infinity (measured): 180 degrees
Range of diopter adjustment (measured): +/- 4 dpt*
Excess travel of focus wheel beyond infinity position (estimate): 5 dpt*
Focus type:  CF
Prism system:  Porro I
Waterproof: no
Weight (measured, with eyepiece cover and strap): 957 g
Made in: Japan
*range of diopter adjustment not affected by position of focus wheel



There was a time when Bushnell sold fine, high quality binoculars made in Japan, such as this Rangemaster from 1955. With its 10 degree (=175m) field of view, well corrected optics and solid mechanics, these vintage instruments are today sought after by binocular enthusiasts. Today, sixty years later, Bushnell stills sells binoculars in the low to medium price range, with production outsourced to China (such as the 6×30 or 8×42 models in this collection, see separate posts
Bushnell Natureview 6×30, https://binocular.ch/bushnell-natureview-6×30/
Bushnell Forge 8×42, https://binocular.ch/bushnell-forge-8×42/.


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