The 7x30 Cavalry Binocular with Compass from Celestron is a weather-sealed optic designed for mid-range observations. This configuration of the Cavalry binocular includes an integrated ranging reticle that assists the observer with estimating the distance to and size of objects within the field of view. And a built-in 6400 mil magnetic compass displays the observer's direction at the bottom of the field of view. Cavalry series binoculars feature fully multicoated optics and BaK-4 prisms that render enhanced clarity and color fidelity. An immersive 57° apparent viewing angle and non-slip rubber armoring complement the 7x30 lens system and help provide a user-friendly glassing experience. The Cavalry binocular has a nitrogen-filled housing that is built to withstand heavy rain and deliver fogproof performance, making this Celestron optic ready for a wide range of outdoor glassing activities. Optical Performance:. 7x magnification, 30mm objectives. Fully multicoated optics, BaK-4 Porro prisms. 8.2° angle of view, 57° apparent viewing angle. 8.2 fit (2.5m) close focusing distance, 17.5mm eye relief. Integrated ranging reticle. Use and Handling:. Built-in analog compass. Center focus wheel with ridges for improved grip. Twist-up eyecups for comfortable viewing with eyeglasses. 52-72mm interpupillary adjustment range. Tripod mountable. Construction Details:. Nitrogen-filled housing for fogproof/waterproof performance. Rubber armored exterior. Prism Type: Porro. Magnification: 7.0x. Objective Lens Diameter: 30 mm. Angle of View: 8.2° (actual). Field-of-View: 430' x 1000 yard / 142.76 m x 1000 m. Minimum Focus Distance: 8.2' / 2.50 m. Exit Pupil Diameter: 4.2 mm. Eye Relief: 17.5 mm. Interpupillary Adjustment: 52 - 72 mm / 2.05" - 2.83". Focus Type: Center. Tripod Mount: Yes (Adapter Optional). Dimensions: 6.3" x 4.7" x 2.3" / 16.00 x 11.94 x 5.84 cm.