Olympus EXPS I 8×42

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Objective diameter:  42 mm
Magnification:  8 x
Exit pupil: 5.25 mm
Eye relief (acc. to spec): 18 mm
Usable eye relief (measured from rim of eyecup): 17.5 mm
IPD: 58  – 72 mm
RFOV:  6.5  degrees = 114 m
AFOV (according to spec.):   52 degrees
Minimum focus distance (measured): 3.85 m
Focus type:  CF (direction of rotation from close to infinity: < anticlockwise)
Degrees of rotation of focus wheel from 3.85 m to infinity (measured): 200 degrees
Range of diopter adjustment (estimate): +/- 4 dpt*
Excess travel of focus wheel beyond infinity position (estimate): 5 dpt*
Prism system:  Porro I
Waterproof: no
Weight (measured, with eyepiece cover and strap): 817 g
Made in: China
*range of diopter adjustment not affected by position of focus wheel



Olympus produces three different 8×42 binoculars: the “Pro” (Olympus’ top model, see separate post https://binocular.ch/olympus-8×42-pro/), the EXWP I (waterproof roof prism model, see separate post https://binocular.ch/olympus-exwp-i-8×42/) and this Porro model, which is not waterproof, shows acceptable optical and mechanical performance, but has a narrow field of view. Compared to similar models from competitors such as Nikon (e.g. Nikon Action EX 8×40, see separate post https://binocular.ch/nikon-action-ex-8×40-cf/), the EXPS appears expensive for what it offers.




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