Pentax 8.5x21 Papilio II Porro Prism BinocularsThe Pentax Papilio II 8.5 x 21 Porro Prism Binoculars feature a unique Uni-body design that enhances durability by locking objective lenses in a single housing minimizing moving parts and assuring functionality for years to come. Fully-multi-coated Aspherical lens elements assures the edge of your field of view is just as sharp as those in the center and maximizes light transmission resulting in high-quality viewing. The Pentax-developed Convergent Lens Optical System Engineering (Close) mechanism automatically slides the left and right objective lenses toward the center to facilitate close-range viewing down to 1.6 feet.High-Quality OpticsFully multi-coated optics ensure maximum light transmission resulting in high-quality viewing. Every surface of every element is fully coated minimizing internal glare and flare and giving a bright clear view.Unique Uni-Body DesignThe unique Uni-body design enhances durability by locking objective lenses in a single housing and synchronizing the eyepiece movement. This minimizes moving parts and assures these binoculars will function properly and clearly for years to come.Aspherical Lens ElementsAspherical lens elements which are critical in compact binoculars provide exceptional edge-to-edge sharpness. This assures that items on the edge of your field of view are just as sharp as those in the center.For Close-Range ObservationSpecifically developed to satisfy user demands for close-range observation of butterflies and other insects.Bundle Includes: Pentax 8.5 x 21 Papilio II Porro Prism Binoculars Binocular Harness Lens Cleaning Pen