Why sacrifice performance from your optic simply because you aren't burning primers? The 3-9x40mm Tasco Air Rifle scope offers all the versatility and performance you expect in a riflescope, purpose-built for the air gun platform. Power/Obj. Lens (mm): 3-9x40 Field of View (ft.@100yds./m@100m): 40-13/13.3-4.3 Lens Coating*: Fully Coated Focus Type: Fast Focus Eyepiece Parallax Setting (yds./m): 100/91.4 Eye Relief (in./mm): 3.9/98 Reticle Type: Truplex Windage/Elevation: .25 MOA Tube Dia.: 1 inch Weight (oz./g): 16.3/462 Length (in./mm): 12.5/318 Finish: Matte Black Exit Pupil (mm): 11/4.6 Model: TAR3940