Technical data BF 8x42 BF 10x42
Magnification 8 x 10 x
Front lens diameter 1.65 inch / 42.0 mm 1,65 inch / 42.0 mm
Exit pupil 0.21 inch / 5.25 mm 0.17 inch / 4.2 mm
Field of view 389 ft at 1,000 yds 7.4° 342 ft at 1,000 yds 6.5°
129 m at 1,000 m 7.4° 114 m at 1,000 m 6.5°
Eye relief 0.71 inch / 18.0 mm 0.60 inch / 15.0 mm
Close distance 3.94 ft / 1.2 m 3.94 ft / 1.2 m
Over run (∞) 4 dpt 4 dpt
Diopter adjustment ±4 dpt ± 4 dpt
Twilight factor 18.3 20.5
Geom. Twilight no. 27.6 17.6
Operating temperature 14° up to 122° F 14° up to 122° F
-10° up to +50° C -10° up to +50° C
Waterproof yes, down to 9.84 ft / 3.0 m yes, down to 9.84 ft / 3.0 m
Height x Width x Depth 5.5 x 5.0 x 2.0 inch 5.5 x 5.0 x 2.0 inch
140 x 127 x 51 mm 140 x 127 x 51 mm
Weight approx. 27.5 oz / 780 g 27.5 oz / 780 g
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