Product Info for Bushnell 12x50 Engage Roof Prism Waterproof Binocular The only sure thing about any environment is that it will change temperatures, moisture and lighting conditions can all fluctuate from one minute to the next. Engage binoculars were built from the inside out to deliver world-class performance every time, in every condition. The glass captures bright, clear images while preventing glare and actively repelling water, oil, dust and debris. The locking diopter permanently secures the desired focus setting, no matter what. The rugged chassis is built to take a beating, so you can maintain focus and engage on what's out ahead. Backed by the Bushnell Ironclad Warranty. Specifications for Bushnell 12x50 Engage Roof Prism Waterproof Binocular: Color: Black Magnification: 12 x Objective Lens Diameter: 50 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 15 mm Exit Pupil: 4.1 mm Field of View, Linear: 280 ft at 1000 yds Optical Coating: Fully Multi-Coated Close Focus: 10 ft Weight: 29.2 oz Magnification Type: Fixed Features of Bushnell 12x50 Engage Roof Prism Waterproof Binocular: ED Prime Glass is fully multi-coated to offer maximum brightness; Dielectric prism coating and ultra wide-band coatings provides precision and clarity; EXO Barrier lens coating repels water debris oil and fog; Environmentally-friendly lead-free glass; Lightweight yet rugged magnesium chassis is fully waterproof Included Accessories: Case