Feature A Enhanced Precision: Custom-Patent Reticle Optimized for 25-Meter Benchrest Shooting for Consistent Shot Placement A Brighter Sight Picture: 50mm Large Objective Lens Improves Light Transmission for Bright, Sharp, High-Contrast Viewing A Greater Adjustment Range: Durable 30mm Tube Provides Wider 50 MOA Elevation Travel with Accurate 1/8 MOA Click Adjustments A Exact Bullseye Alignment: At 40x Magnification, the 1.5mm Center Dot Fits the Standard 2mm Bullseye for Precise Aim A Stable Operation: Turret Lock Prevent Accidental Movement with Side Focus from 10 yds for Clear Close-to-Long-Range Shooting Reticle Sentinel-X 10-40x50 SFP Long-Range Rifle Scope (SCOL-34) Scenario: Benchrest Shooting Reticle Name: COM-25M A Reticle Use at 40x power & 25m for 25m benchrest shooting A Each graduation on horizontal line coincides with all target rings A 1.5mm Center Dot Perfect Matches Target 2mm Dia. Bull-eye Specification See our Terminology Guide for detailed explanations of each specification. Specification Details A Magnification: 10-40x A Objective Lens: 50mm A Ocular Lens Dia: 44mm / 1.7 inch A Ocular Length: 67mm / 2.6 inch A Exit Pupil: 5.0-1.25mm A Length: 405mm / 15.9&';&'; A Weight (net): 750g / 26.5oz A Eye Relief: 92-85mm / 3.6-3.3 inch A Field of View (@100yds): 3.8-1.1Adeg A Optics Coating: Fully-multi coated A Reticle: Etched glass COM-25M A Click Value: 1/8MOA A Evaluation Range: 50MOA A Windage Range: 50MOA A Parallax Adjustment: 10 Yds to infinite A Finish: Black matte A Illumination: N/A A Distance between objective lens part and middle turret: 77mm (3.0 inch) A Length of middle turret part: 38mm (1.5 inch) A Distance between middle turret parts to power ring: 56mm (2.2 inch) A Including items: 30mm weaver rings (default) , cleaning cloth, instruction, filp-up cap and packed in nice retail box Size Compatible Gun Type For Benchrest Shooting: CZ 457 (.22LR), Tikka T1x / Anschutz / Sako / Howa, Remington 700 / Tikka T3x Video