Fujinon KF 8x42 specs and field of view

The KF 8x42 prints a 393 ft field at 1,000 yd, exactly the median for its size, and a calculated exit pupil of 5.3 mm. It weighs 23.6 oz.

Field of view: 393 ftat 1,000 yd
Eye relief: 15 mm
Weight: 23.6 oz
Exit pupil: 5.3 mmcalculated

Why pick it

23.6 oz, lighter than the typical 24.2 oz

KF 8x42: width of view at 1,000 yd, against the median of the 75 8x42 models.

Who the KF 8x42 suits

Dusk viewing suits the 5.3 mm calculated exit pupil and relative brightness of 27.6. Weight is under the 24.2 oz median for the size.

Its 15 mm eye relief is below the 18 mm median, so glasses may press close, and no close focus figure is printed.

KF 8x42 can be set against the most popular models of every size in the best binoculars list. KF 8x42 is one of 75 models in the 8x42 binoculars comparison.

KF 8x42 specifications

KF 8x42 figures as Fujinon prints them; rows marked * are calculated from the 8x42 size.

KF 8x42 specifications
Magnification	8x
Objective lens	42 mm
Field of view	393 ft at 1,000 yd (131 m at 1,000 m)
Angular field of view	7.5°
Apparent field of view	60° *
Eye relief	15 mm
Weight	23.6 oz (670 g)
Exit pupil	5.3 mm *
Twilight factor	18.3 *
Relative brightness	27.6 *

* Calculated from the size, not printed by the maker.

KF 8x42 against other 8x42 binoculars

KF 8x42 shows 393 ft at 1,000 yd, at or above the 393 ft median of the 75 8x42 models in the chart. At 23.6 oz it is at or under the 24.2 oz median weight for the size.

Swarovski NL Pure 8x42477 ft
Minox X-PRO 8x42462 ft
ZEISS Victory SF 8x42444 ft
Nikon Monarch M7 8x42435 ft
Nikon Monarch HG 8x42435 ft
Kowa BD III 8x42 XD429 ft
Celestron TrailSeeker ED 8x42426 ft
GPO Passion ED 8x42426 ft
Celestron TrailSeeker 8x42426 ft
Athlon Midas G2 UHD 8x42426 ft
Hawke Frontier ED X 8x42426 ft
Fujinon KF 8x42393 ft

8x42 binoculars by field of view at 1,000 yd, widest first, from the makers' figures.

KF 8x42 and its nearest rivals

KF 8x42 next to the 8x42 models closest to it in maker list price, with the best figure in each column in bold.

Model	Field of view	Eye relief	Close focus	Weight	Exit pupil	Amazon
Fujinon KF 8x42	393 ft	15 mm		23.6 oz	5.3 mm
ZEISS Terra ED 8x42	375 ft	18 mm	5.3 ft	25.6 oz	5.3 mm	Check price on Amazon
Bushnell H2O 8x42 (roof)	360 ft	17 mm	15 ft	22.7 oz	5.3 mm	Check price on Amazon
ZEISS Victory SF 8x42	444 ft	18 mm	4.9 ft	27.8 oz	5.3 mm

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Other sizes of the KF

Fujinon makes the KF in 6 sizes; a larger front lens adds brightness and weight, and more magnification narrows the view.

Model	Size	Field of view	Eye relief	Weight	Exit pupil	Amazon
Fujinon KF 8x42	8x42	393 ft	15 mm	23.6 oz	5.3 mm
Fujinon KF 8x25	8x25	351 ft	15 mm	13.4 oz	3.1 mm
Fujinon KF 10x25	10x25	294 ft	15 mm	13.4 oz	2.5 mm
Fujinon KF 8x32	8x32	396 ft	14.5 mm	19 oz	4 mm	Check price on Amazon
Fujinon KF 10x32	10x32	341 ft	14.5 mm	19.8 oz	3.2 mm	Check price on Amazon
Fujinon KF 10x42	10x42	315 ft	13 mm	23.6 oz	4.2 mm

Fujinon binoculars

KF 8x42 questions

KF 8x42: does it work with glasses?

KF 8x42 has 15 mm of eye relief, under the 16 mm the RSPB advises for people who wear glasses, so the edge of the view may be cut off with glasses on.

KF 8x42: what does 8x42 mean?

KF 8x42 magnifies 8 times through 42 mm front lenses, which works out to an exit pupil of 5.3 mm, the width of the beam of light that reaches each eye.

KF 8x42: how wide is the view?

KF 8x42 shows a view 393 ft wide at 1,000 yd, at or above the 393 ft median of the 75 8x42 models in the chart.