The Z8i marks a milestone by SWAROVSKI OPTIK. This rifle scope's 8x zoom and outstanding optics ensure that you couldn't be better equipped for every type of hunting. The slim 30-mm (1.2 in) central tube also blends seamlessly with any hunting firearm. In addition, the ballistic turret flex and FLEXCHANGE, the first switchable reticle, provide you with maximum versatility in every hunting situation. Its exceptional field of view enables you to maintain an overview all the time. The perfect optical system offers excellent viewing comfort and ensures rapid target acquisition. Field of view: 24.0-3.0 degrees Field of view, apparent 24 degrees Dioptric compensation: -3 to +2 dpt Light transmission: 93% Twilight factor acc. to ISO 14132-1: 2.9-13.9 Impact point corr. per click (in/100 yds / mm/100 m): 0.36 / 10 Max. elevation / windage adjustment range (in/100 yds / m/100 m): 72 / 2 Objective filter thread: M 27x0.75 Central tube diameter (in / mm) 1.18 / 30 Functional temperature -4 degF to +131 degF (-20 degC / +55 degC) Storage temperature -22 degF to +158 degF (-30 degC / +70 degC) Submersion tightness 13 ft / 4 m water depth (inert gas filling) Brightness levels: Twilight: 0 - 32 / Day: 33 - 64 Operating time (h): Twilight factor at medium brightness: 1,400; daylight factor at medium brightness: 180