Magnification and optics: 440x40mm variable magnification with a 40 mm objective lens. This enables longrange viewing and detailed observation across a wide zoom range. Field of view: 4.4 degrees at 8x and 1.6 degrees at 40x. The field of view narrows as magnification increases, helping you locate subjects at different distances. Coatings and image quality: FMC multilayer broadband green film constructed with alloptical glass. This provides light transmission, bright and transparent color, clear and sharp images, true color reproduction, and no color differences. Zoom control: 760 stepless zoom for smooth magnification changes. You can easily zoom in or out to frame the observed object. Focusing mechanism: focusing hand wheel features a stripe antislip design and antislip teeth, helping you hold the position without slipping. Clockwise rotation adjusts sharpness for precise focusing and convenient operation. Use scenarios: Wildlife and bird watching: observe distant animals with clear detail and accurate color without constantly moving the device. Longrange landscape or field scouting: assess distant terrain or targets with stable magnification and sharp focus. Target practice or range observation: finely tune magnification and sharpen the image for accurate assessment of hits and practice scenarios.