Specifications:

Objective diameter:  70 mm
Magnification:  10x
Exit pupil: 7 mm
Eye relief (acc. to spec): 15 mm
IPD:  56 – 72 mm
RFOV:  5.1  degrees = 89 m
AFOV:   51 degrees
Focus type:  IF
Prism system:  Porro I
Waterproof: yes
Weight (measured, with eyepiece cover and strap): 2‘037 g
Made in: Japan

  

Remarks:

Nikon has been manufacturing two lines of their large handheld Porro binoculars: the “HP” (“High Performance”) line, which consists of a 7×50 (sometimes also called “Tropical”) and a 10×70 model, both frequently advertised as marine binoculars, and the “SP” (“Superior Performance”) line coming in sizes 7×50, 10×70 and 18×70 (sometimes called “Astroluxe”, the 18×70 model is actually labelled “IF WP WF” because of it’s wide 64.3 degree apparent field of view), usually sold for nature observation and astronomy. From the outside, the two lines can be distinguished  because the SP line features a red ring at the front of the objective tubes, whereas the HP line doesn’t. Otherwise, same size models of both lines have the same dimensions, all are waterproof, and the usual specifications are identical between same size models of the two lines. However, the significantly more expensive “SP” binoculars have flatfield optics with excellent sharpness over almost the entire field of view. The off-axis sharpness of the HP binos, which exhibit slightly more field curvature, is less distinct. Still, the 10×70 IF HP WP (“Individual Focus High Performance Water Proof”) is a formidable instrument both for nature observation or under a dark sky.

Ratings:

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Review:

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