Zoom 10-30X42 Monoculars telescope Magnification:10-30x Objective lens diameter: 42mm Prism type: Bak-4 Exit pupil: 5mm - 1.7mm Exit relief: 16mm-16.5mm Lens coating: Fully multi-coated Close focusing di: /9.8ft Fully multi-coated optics reduces light loss and glare. There is absolute clarity at both near and distant focus, which beyond your expectation. Twist-up eyecup is easily adjusted to maximize custom fit for comfortable viewing with or without eyeglasses. Zoom 10-30x magnification offers you different viewing experience, which allows you to catch more details as well as locate moving targets. This monocular features a tripod thread to free your hands and maintain images stable from fluttering. Our 10-30X42 monocular telescope allows you to take a closer look at this amazing world and serve you well in all environments with its own protection. Excellent clarity and color quality are ideal for capturing small details up close or far. They are easier to hold for a stable view. You can easily see the targets you are interested in, such as distant animals, birds, concerts, landscapes, and sporting events.