Designed to excel in early-morning and late-evening light. Dusk Dawn Brightness multicoated lenses provide superior clarity, brightness, and increased visibility in low-light situations. Adjustable objective and parallax setting from 10 yards. Each scope features a rugged, one-piece, dry-nitrogen-filled tube that is 100% waterproof, fogproof, and shockproof. The fast-focus eyepiece lets you make last-second adjustments when sighting-in your target. Adjustable objective and parallax setting from 10 yards.