The 10x42 TrailSeeker Binocular from Celestron is a weather-sealed optic designed for close to mid-range observations. This lightweight binocular weighs less than 2 lbs and is compact enough to fit in the side pocket of a daypack. In addition to the TrailSeeker series' streamlined form factor, this fixed-magnification binocular features a phase-correcting dielectric prism coating that renders enhanced clarity and color fidelity. An immersive 65° apparent viewing angle and impressive 6.5 fit minimum focus distance complement the fully multicoated lens system and help provide a user-friendly glassing experience that is ideal for birding. The TrailSeeker binocular has a nitrogen-filled magnesium alloy housing that is built to withstand heavy rain and deliver fogproof performance, making this Celestron optic ready to handle almost any outdoor glassing activity. Optical Performance:. 10x magnification, 42mm objectives. Fully multicoated optics. BaK-4 roof prisms with phase-corrective dielectric coating. 6.5° angle of view, 65° apparent viewing angle. 6.5 fit (2m) close focusing distance, 15mm eye relief. Use and Handling:. Center focus wheel with ridges for improved grip. Twist-up eyecups with multiple position stops. 55-73mm interpupillary adjustment range. Included stabilization harness for birding. Tripod adaptable. Construction Details:. Nitrogen-filled housing for fogproof/waterproof performance. Magnesium alloy construction. Prism Type: Roof. Magnification: 10.0x. Objective Lens Diameter: 42 mm. Angle of View: 6.5° (actual). Field-of-View: 341' x 1000 yard / 113.21 m x 1000 m. Minimum Focus Distance: 6.5' / 1.98 m. Exit Pupil Diameter: 4.2 mm. Eye Relief: 15 mm. Interpupillary Adjustment: 55 - 73 mm / 2.17 - 2.87". Focus Type: Center. Tripod Mount: Yes (Adapter Optional). Dimensions: 5.5" x 5.1" x 2" / 13.97 x 12.95 x 5.08 cm.