Pentax Papilio II 6.5 x 21 Porro Prism Binoculars with Harness and Lens PenPentax 6. 5 x 21 Papilio II Porro Prism Binoculars The Pentax Papilio II 6. 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 assure the edge of your field of view is just as sharp as those in the center and maximize light transmission resulting in high