DESC: UpClose binoculars will handle your most demanding viewing challenges. The economically-priced UpClose Porro Prism Series is comprised of five full-size models, including one zoom model. UpClose porro prisms are robust full-size binoculars that feature a large knurled center focus knob for smooth and accurate focusing and a diopter adjustment on the right eyepiece for fine tuning the focus to your individual eyesight requirements. The Zoom model features a conveniently located finger lever for quick, accurate zoom adjustments. Rubber covering with finger impressions provides comfort and a secure grip.