Dimensions: 5.6" x 5.28". 361ft. @ 1000yds. Porro prism. Eye relief: 20mm. Objective clear aperture: 1.57in. Carry case. Center focus. Ideal for the widest range of lighting and weather conditions. Large objective lens incorporated in the design allow for rich contrast and bright viewing under all light conditions. Focusing range: 11.55 ft-infinity. Objective Lens Diameter: 40mm. Real Field of View: 6.3 degrees. Field of View at 1000m: 110m. Exit Pupil: 5.0mm. Relative Brightness: 25.0. Helicoid eyepiece ring. Color: Black.