Specifications:

Objective diameter:  56 mm
Magnification:  20 x
Exit pupil: 2.8 mm
Eye relief (acc. to spec): 16 mm
Usable eye relief (measured from rim of eyecup): 12 mm
IPD:  60 – 72 mm
RFOV:  3.3  degrees = 58 m
AFOV:  60 degrees
Minimum focus distance (measured): 2.5 m
Focus type: CF (direction of rotation from close to infinity: > clockwise)
Range of diopter adjustment (estimate): +/- 5 dpt*
Excess travel of focus wheel beyond infinity position (estimate): 6 dpt*
Prism system:  S-P
Waterproof: yes
Weight (measured, with eyepiece cover and strap): 1‘290 g
Made in: China
*range of diopter adjustment not affected by position of focus wheel

 

Remarks:

The largest Nikon Monarch binocular with 56mm objective lenses comes in two versions, a 20x and a 16x. They are light, but well built and more compact than most other 16x or 20x instruments. Upper middle class performance for a middle class price; good stray-light suppression, an acceptable amount of CA, decent sharpness and contrast. With the 20x model, you can separate Saturns’s ring from the planet body in good seeing conditions. Newer 20×70 or 20×80 binoculars may give a slightly brighter image and even better sharpness, but they are all clearly larger and heavier.

see also remarks under separate post “Nikon Monarch 5 16×56”, https://binocular.ch/nikon-monarch-5-16×56/

Ratings:

Review:

https://www.cloudynights.com/topic/532550-reasonable-20x-25x-bino-choices/?p=7144894

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