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Technical data ATC / STC
ATC 17-40x56
Color
green
burnt orange
Objective
17-40xMagnification
56 mmEffective objective lens diameter
3.4-1.4 mmExit pupil diameter
20 mmEye relief
62-34 m/1000mField of view at m/1,000 m / ft/1,000 yds
3.52-1.93 °Field of view degrees
57-71 °Field of view apparent
3.4 mShortest focusing distance
> 5 dptDiopter correction at ∞
88 %Light transmission
Digital
M 58x0.75Objective filter thread
Environment & Conditions
-25 to 55 °CFunctional temperature
-30 to +70 °CStorage temperature
13 ft (4m) water depth (inert gas filling)Submersion tightness
Size & weight
970 gWeight
258 mmLength in mm.