Leupold's Mark 5HD riflescope delivers superior edge-to-edge clarity and extreme low-light performance, while the versatility of its multiple reticle options will give you an advantage at the range or in the field. With three revolutions of elevation adjustment, the Mark 5HD scope was built to max out the performance of the latest long-range rifles and ammo.5:1 Zoom RatioProfessional-grade Optical System1/10 Mil or 1/4 Moa AdjustmentsMotion Sensor Technology (MST(TM))Removable Throw Lever35mm MaintubeWaterproof, Fogproof, & ShockproofM5C3 or M1C3 Zerolock Adjustment Dials