Magnification 10x
Effective objective lens diameter (mm) 42
Exit pupil diameter (mm) 4.2
Exit pupil distance (eye relief) (mm) 20
Field of view (ft/1000 yds / m/1000 m) 336 / 112
Field of view (degrees) 6.4
Field of view for eyeglass wearers (degrees) 6.4
Field of view, apparent (degrees) 60
Shortest focusing distance (ft / m) 4.9 / 1.5
http://aa.swarovskioptik.com/nature/el-42-c21011001/el-8p5x42-p5222897
Dioptric compensation (dpt) ± 5
Diopter correction at ∞ (dpt) 8
Light transmission (%) 90
Pupil distance (in / mm) 2.2-2.9 / 56-74
Twilight factor acc. to ISO 14132-1 20.5
Technical Data
Length approx. (in / mm)* 6.3 / 160
Width approx. (in / mm)** 5.2 / 131
Height approx. (in / mm)** 2.4 / 61
Weight approx. (oz / g) 28.0 / 800
Functional temperature -13 °F to +131 °F (-25 °C / +55 °C)
Storage temperature -22 °F to +158 °F (-30 °C / +70 °C)
Submersion tightness 13 ft / 4 m water depth (inert gas filling)
