Pick up a Mark 5HD 5-25x56mm and you'll feel the difference. It's up to 20 ounces lighter than other riflescopes in its class, giving you an advantage in the field or at the range. The versatile 5-25x magnification lets you dominate midrange shots, while also giving you the flexibility to reach out to long distances. With three revolutions of elevation adjustment and multiple reticle options, this scope will max out the performance of the latest long-range rifles and ammunition, guaranteed.Built around Leupold's Professional-Grade Optical System, the Mark 5HD offers unmatched light transmission that's designed to outperform in the most challenging lighting conditions. Its industry leading glare reduction provides a clear image in harsh, direct light, while the resolution and clarity will meet the demands of any professional guide or shooter. Ergonomically designed with more tactile and audible click adjustments, larger numbers, and a high-speed throw lever, the Mark 5HD is built to put accurate fire downrange faster.The unique combination of features, durability, and professional-grade optical performance guarantees that the Mark 5HD can handle any challenge you throw at it. It's 100% waterproof and fogproof, and like all Leupold riflescopes, it's designed, machined, and assembled in the USA and guaranteed to perform for life.Features5:1 Zoom RatioA versatile 5:1 zoom ratio gives you 5 times more magnification at high power than at low power (model magnification ranges may be available in powers of 5x: 1-5, 2-10, 3-15, 4-20, etc.), so you can adjust your magnification to find the perfect balance between magnification and field of view for any situation. The larger the zoom ratio, the more versatile one scope can be.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.Zero Lock DialThe ZeroLock system eliminates accidental dial movement by locking it in place.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.Twilight Max HDThe Twilight Max HD Light Management Systems offers our clearest, brightest image with three main benefits: Best Light Transmission - Maximizes the most ambient light in low-light environments for extended visibility. Best Glare Management - Reduces more glare through maximum lens coatings and minimizes image washout caused by stray light. Best Contrast & Resolution - Creates the clearest possible image using premium high-definition, edge-to-edge lens prescriptions and additional HD lens coatings.M1C3 AdjustmentsThese low-profile dials are available on select models and provide up to 71.5MOA of adjustment in 3 revolutions and 1/4 MOA clicks. Visual and tactile revolution indicators ensure you don't get lost in the travel. The ZeroLock feature prevents inadvertent adjustments and ensures accurate return to zero.Motion Sensor Technology (MST)Motion Sensor Technology (MST) extends battery life by automatically deactivating illuminated reticles after five minutes of inactivity and then reactivates instantly as soon as movement is detected.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.