Fujinon KF 8x25 specs and field of view

At 13.4 oz, the KF 8x25 shows a 351 ft field at 1,000 yd, which places 16th of 21 models of its size.

Field of view: 351 ftat 1,000 yd
Eye relief: 15 mm
Weight: 13.4 oz
Exit pupil: 3.1 mmcalculated

KF 8x25: width of view at 1,000 yd, against the median of the 21 8x25 models.

Who the KF 8x25 suits

A calculated exit pupil of 3.1 mm and 15 mm eye relief suit daytime travel and carry in a coat pocket.

Weight sits above the 10.9 oz median and the field falls under the 357 ft median. No close focus is printed.

KF 8x25 can be set against the most popular models of every size in the best binoculars list. KF 8x25 is one of 21 models in the 8x25 binoculars comparison.

KF 8x25 specifications

KF 8x25 figures as Fujinon prints them; rows marked * are calculated from the 8x25 size.

KF 8x25 specifications
Magnification	8x
Objective lens	25 mm
Field of view	351 ft at 1,000 yd (117 m at 1,000 m)
Angular field of view	6.7°
Apparent field of view	53° *
Eye relief	15 mm
Weight	13.4 oz (380 g)
Exit pupil	3.1 mm *
Twilight factor	14.1 *
Relative brightness	9.8 *

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

KF 8x25 against other 8x25 binoculars

KF 8x25 shows 351 ft at 1,000 yd, below the 357 ft median of the 21 8x25 models in the chart. At 13.4 oz it is heavier than the 10.9 oz median for the size.

Opticron Imagic HD X-Wide 8x25465 ft
Nikon Trailblazer II 8x25435 ft
Celestron Outland X 8x25432 ft
Nikon Trailblazer 8x25 ATB429 ft
Hawke Frontier ED X 8x25421 ft
ZEISS Victory Pocket 8x25390 ft
Leupold BX-1 Rogue 8x25 Compact377 ft
Minox X-active 8x25363 ft
Bushnell H2O 8x25 Compact361 ft
Leica Noctivid Compact 8x25360 ft
ZEISS Terra ED Pocket 8x25357 ft
Fujinon KF 8x25351 ft

8x25 binoculars by field of view at 1,000 yd, widest first, from the makers' figures.

KF 8x25 and its nearest rivals

KF 8x25 next to the 8x25 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
Fujinon KF 8x25	351 ft	15 mm		13.4 oz	3.1 mm
ZEISS Terra ED Pocket 8x25	357 ft	16 mm	6.2 ft	10.9 oz	3.1 mm
ZEISS Victory Pocket 8x25	390 ft	16.5 mm	6.2 ft	10.2 oz	3.1 mm
Bushnell H2O 8x25 Compact	361 ft	11 mm	19 ft	10.3 oz	3.1 mm

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 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 8x42	8x42	393 ft	15 mm	23.6 oz	5.3 mm
Fujinon KF 10x42	10x42	315 ft	13 mm	23.6 oz	4.2 mm

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KF 8x25 questions

KF 8x25: does it work with glasses?

KF 8x25 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 8x25: what does 8x25 mean?

KF 8x25 magnifies 8 times through 25 mm front lenses, which works out to an exit pupil of 3.1 mm, the width of the beam of light that reaches each eye.

KF 8x25: how wide is the view?

KF 8x25 shows a view 351 ft wide at 1,000 yd, below the 357 ft median of the 21 8x25 models in the chart.