The Kahles K318i 3.5-18x50i Riflescope means optical and mechanical perfection packed into an ultrashort design. It features a precise, illuminated MSR MIL-based reticle in the first focal plane. The scope is capable of producing sharply defined images throughout its magnification range of 3.5 to 18x. The main tube has a diameter of 34mm, which is standard for tactical scopes. The elevation and windage adjustment works in a counter-clockwise direction for this model. Plus, this riflescope comes with a right-sided windage turret, perfectly suitable for left-handed shooters. Thanks to the unique arrangement of operating elements that allow for superior handling and ergonomics. First Focal Plane - When viewing the reticle in the first image plane, the reticle size also changes when the magnification is changed. The bar spacing and the coverage range remain the same. Zero Stop - The Zero Stop or mechanical stopping point is 3 or 4 clicks below the zero indicator and can be activated after having zeroed the scope. This feature allows to find intuitively and quickly the zero indicator (e.g. in bad light conditions) and to adapt perfectly to special circumstances, such as e.g. high temperatures or very close targets. Twist Guard Windage - The innovative Twist Guard windage with its freely rotating end cover reliably prevents accidental movement of the windage. This simple solution protects the windage from accidental movement. It also allows the shooter, fast and unhindered handling of the windage without the need for cumbersome locking and unlocking. Easy to Use Turrets - Due to the unique arrangement, all operating elements can easily and comfortably be operated with the intuitively preferred hand. Ergonomically the windage is perfectly placed on the left side for right-handed shooters and on the right side for left-hand shooters. Without having to reach over the riflescope or having to move out of the shooting position, all relevant information is always in the visual field. All riflescopes of the K-series have the parallax wheel integrated into the elevation turret. The patented central arrangement on top of the riflescope makes right and left-handed operations equally comfortable Magnification: 3.5 to 18x Objective lens diameter: 50 mm Field of view: 27.75 to 5.49 feet at 100 yards Reticle (first focal plane): MSR/Ki Impact point correction/click (100 m): 0.1 MIL Adjustment range (E/W): 30 / 20 MIL Central tube diameter: 34 mm Parallax adjustment: 27 yards to infinity Diopter compensation: +2.5 / -3.5 dpt Twilight factor (DIN 58388): 13.2 to 30.0 Illuminated: Yes Objective filter thread: M52 x 0.75 Exit pupil diameter: 6.9 to 2.8 mm Eye relief: 92 mm Windage: Counter-clockwise Windage position: Right side Length: 12.32 inch Weight: 32.59 oz