Carl Zeiss 10x40 SFL Binoculars User Manual
Page 8
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TECHNICAL DATA
8 x 40
10 x 40
Magnification
8
10
Objective lens diameter
mm
40
40
Exit pupil diameter
mm
5
4
Twilight factor
17.9
20
Field of view
m/1000 m
(ft/1000 yds)
140
(420)
115
(345)
Subjective angle of view
°
60
62
Close focusing distance
m (ft)
1.5 (4.9)
1.5 (4.9)
Diopter adjustment range
dpt
± 4
± 4
Exit pupil distance
mm
18
18
Pupillary distance
mm
52–74
52–74
Prism system
Schmidt-Pechan
Schmidt-Pechan
Coating
T*
T*
Nitrogen filling
√
√
Watertightness
mbar
400
400
Functional temperature range
°C
(°F)
-20 / +55
(-4 / +131)
-20 / +55
(-4 / +131)
Length
mm (in)
144 (5.7)
144 (5.7)
Width with a pupillary distance
of 65 mm
mm (in)
114 (4.5)
114 (4.5)
Weight
g (oz)
640 (22.6)
640 (22.6)
Subject to changes in design and scope of supply due to technical improvements.