10 x 42 L IS WP Features Canon's first waterproof IS Binocular High performance L Lens with 2 Ultra-low Dispersion (UD) elements on each side Doublet Field Flattener Lenses for sharp, distortion-free images edge-to-edge Bright field-of-view from a 4.2mm exit pupil diameter, the largest of any Canon IS Binocular Wide angle rating from an apparent angle-of-view of 65° One touch IS usage Body components feature metallic coating to prevent fogging Distinctive, easy grip design The much-anticipated 10x42 L IS WP is the first waterproof binocular to incorporate Canon's exclusive Image Stabilizer technology for steady, shake-free viewing. The high quality L series optics, featuring 2 Ultra-low Dispersion (UD) lens elements (on each side), deliver excellent correction for chromatic aberration. With a large lens diameter and a 4.2mm exit pupil diameter, this binocular provides an exceptionally bright view, even in low-light conditions. The 10x42 L IS WP binocular offers both the desired brightness and excellent waterproof capabilities, making it ideal for a host of activities including marine use, stargazing and wildlife observation - just to name a few. Binocular Specifications Type Prism binoculars Magnification 10x Objective Lens Effective Diameter 42mm Filter Size 52mm Real Field of View 6.5° Apparent Field of View 65° Objective Lens Construction 4 elements in 3 groups (including protective glass, UD Lens) Eyepiece Lens Construction 7 elements in 5 groups Exit Pupil Diameter 4.2mm Eye Relief 16mm Prism Type Porro II Eye Width adjustment 57-75mm Focusing Method Manual focusing by turning the focusing ring Dioptric Correction +/- 3.0 diopters Closest Focusing Distance 8.2 ft./2.5m Image Stabilizer Vari-Angle Prism Correction angle +/- 0.8° Tripod Socket Provided Power Source AA-size batteries (x2) Dimensions 5.4 x 6.9 x 3.4 in./137 x 175.8 x 85.4mm Weight 2.3 lbs./1030g