Incredible accuracy. Impeccable optical quality. Outstanding ruggedness and absolute waterproof integrity. Leupold Mark 4 riflescopes excel in even the worst conditions, including the rigors of competition and hunting. First-focal plane reticle Lockable, Super Fast-Focus eyepiece Side focus Blackened lens edges DiamondCoat 2 lens surface treatment, for ultimate abrasion-resistance and improved light transmission for improved contrast and clarity Main tube: 30 mm or 34 mm 3:1 zoom ratio with crystal clear image quality across the entire magnification range Generous Eye Box Guard-Ion, rain shedding coating Extended Twilight Lens System for optimal color rendition and light transmission in low-light environments Twin-bias spring erector system Waterproof/Fog-proof ** BLEMISHED products may or may not include accessories. Image may not represent the exact product number.