Leupold 6-18x50 Mark 3HD Riflescope, Black with SFP Side Focus TMR, 30mm Tube

A 3:1 zoom ratio is very common in many scope models. It gives you 3 times more magnification at high power than at low power, so you can dial your power down for close encounters or all of the way up for long-range shots.Zero StopThe ZeroStop system creates a backstop when returning the dial back to zero, so you don't accidently turn the dial a full revolution in the wrong direction.Side FocusThe side focus adjusts the scope's parallax, making the reticle clearer and have less perceived movement when you're shooting at different distances.Custom Dial CompatibleLeupold's Custom Dial System (CDS) gives you the ability to customize your turret (adjustment dial) to your exact ballistics and environmental conditions. Once your new custom dial is installed, simply range the target, turn the dial to that number, and aim dead on.Waterproof, Fogproof, & ShockproofLeupold pioneered modern waterproof and fogproof technology using advanced internal gasses and sealing methods that withstand extreme temperatures, elevation changes, and shocks, so the internals of the optics stay moisture free and crystal clear for life.TMRSubtension And Magnification:The TMR will measure (subtend) correctly when the riflescope is set to the highest available magnification. The reticle's apparent size in the field of view may vary between model's of riflescope.