Pentax UCF Zoom II Central fingertip control includes focus ,locking diopter, and zoom control Revolutionary dual-axis, single body housing with synchronized eye-piece adjustment to assure correct optical alignment for comfortable viewing Fast and easy center focusing for handling ease Fully multi-coated optics to eliminate harmful ultraviolet rays while improving light transmission for high contrast images with no glare or flare. BOX CONTENT: Binocular UCF ZOOM II 8- 16X21, Case (69605), Neck strap (69356), Eyepiece lens caps (69529). Inverted porro prism design results in a light weight, compact body.