Pentax UP 8-16x21U-SeriesThe U-Series consists of binoculars in porro prism design. They are ultra-compact and have a housing with synchronized adjustment of the pupil distance. The new full multi-coating guarantees high light transmission. Aspherical lens elements give edge-to-edge sharpness.These binoculars are the perfect companion for almost all applications.Multiple coating on all lensesOptimum light transmission is one of the most important aspects for the viewing quality of binoculars. This is also the focus of the new technologies for the current PENTAX Sport Optics series. For example, the "Full Multi-Coating" of all lenses is considered the new standard coating. It improves light transmission and contrasts while minimizing reflections and providing excellent color fidelity.Aspherical lens elementsThese specially manufactured lenses reduce aberrations to a minimum and are responsible for sharp and brilliant image reproduction right to the edges. The aspherical hybrid lenses of the U series not only enable good imaging performance, they also allow for a compact and lightweight design.Internal focusingThe internal focusing protects the binoculars from dust, foreign bodies and moisture. This ensures functionality over a long period of use.The rugged multi-talent: -BaK4 with high light transmission and resolution -Multi-coating on all lenses -Passive rubber armor for protection and a secure grip -Synchronized adjustment of pupil distance -Central adjustment wheel for diopter adjustment -Aspherical lens elements for sharpness to the corners -Lightweight and compact.