Pentax UP Black 8x25 Binoculars (61901)

U-Series
These compact, inverted porro-prism models feature a durable dual-axis, single body design with synchronized IPD adjustment and full multi-coating for better light transmission. Aspherical lens elements provide edge-to-edge sharpness. They are a perfect utility companion for a multitude of applications.

This line-up takes a different approach. The dual-axis and inverted porro prism design makes it compact and lightweight. Combined with aspherical lens elements for edge-to-edge sharpness, BaK4 prisms, and multi-coated lenses, you get a star performer ideal as a travel companion, for outdoor events, or for general purpose usage.

New fully multi-coated optics
Fully multi-coated lenses serve the essential purpose of maximizing the amount of light passing through a lens, thereby preventing flare and ghosting from interfering with your view. PENTAX applies multiple layers of coatings to every surface of every element and prism in the full Sport Optics line-up. These fully multi-coated optics assure maximum light transmission resulting in a clear, crisp view of the world.

BaK4 prisms
Due to its outstanding refractive index, the BaK4 glass prism found in all PENTAX Sport Optics is highly acclaimed for its perfectly round exit pupil and clear, unvignetted image.

Aspherical lens elements
Edge-to-edge sharpness is a vital element to comfortable viewing. To achieve this, we utilize aspherical lens elements in our eyepieces. This is a specially shaped lens design that reduces aberration to a minimum.