Objective diameter: 70 mm
Magnification: 18 x
Exit pupil: 3.9 mm
Eye relief (acc. to spec): 15 mm
Usable eye relief (measured from rim of unfoldable eyecup): 7 mm
IPD: 56 – 72 mm
RFOV: 4.0 degrees = 70 m
AFOV: 64.3 degrees
Focus type: IF
Minimum focus distance (estimate): 39 m
Range of diopter adjustment (estimate): +/- 4 dpt
Prism system: Porro I
Weight (measured, with eyepiece cover and strap): 2‘020 g
Made in: Japan
Nikon’s largest handheld nature observation and astronomy binocular, a treasured instrument for hobby astronomers since many years. For a long time, this and Fujinon’s 16×70 FMT binocular (see separate post) were the crème de la crème of large handheld Porro binoculars and an instrument of choice for the avid hobby astronomer, but since a few years, a stream of new 16×70, 20×70 and 20×80 binoculars, made in China and sold under different brand names, have created more competition at attractive prices; some of the newer models feature ED glass and perform very well (e.g. APM, see separate posts). Still, the 18x Nikon is a superb and very well made binocular.
See also remarks under the post “Nikon 10×70 IF HP WP”, https://binocular.ch/nikon-10×70-if-hp-wp/ .