8.5x21 Papilio.No other binoculars like them on the market! Ideally suited for viewing insects birds artwork or any other object at close ranges. C.L.O.S.E. (Convergent Lens Optical System Engineering) allows them to focus down to 1.6 feet. Tough rubber covered exterior provides a sure grip and protects the internal mechanisms. Sleek contemporary ultra-compact body with unibody construction.