Ricoh/Pentax Pentax UP 25 Waterproof 10x25

Pentax UP 25 Waterproof 10x25 – Compact waterproof binoculars with 10x magnification

The Pentax UP 25 Waterproof 10x25 delivers compact optical performance designed for outdoor life. This model belongs to a waterproof series intended to handle a variety of outdoor conditions. It combines a compact inverted porro prism layout with aspherical lens elements, BaK4 prisms and fully multi-coated optics to provide clear images across the field of view.

Designed for outdoor use and travel

The UP 25 emphasizes portability and ruggedness. Its dual-axis, single-body construction with synchronized eyepiece IPD adjustment keeps the binoculars compact and makes them suitable as a travel companion. Consequently, they work well for outdoor events and general purpose usage where a lightweight, reliable optic is preferred.

Optical and mechanical features

Pentax equips this model with optical components that focus on edge-to-edge clarity and light transmission. In particular, the binoculars feature aspherical lens elements and a high-quality BaK4 prism. In addition, Pentax applies new fully multi-coated optics to enhance contrast and reduce reflections.

• New fully multi-coated optics
• Inverted porro prism design
• Waterproof JIS Class6
• Aspherical lens elements providing edge-to-edge sharpness
• High Quality BaK4 prism to enhance transmission and resolution
• Dual-axis, single body design with synchronized eye-piece IPD adjustment
• Deep, blue-tinted rubber armouring for maximum protection and grip
• Pull-up eyecups combined with comfortable eye-relief
• Centrally-located lockable diopter adjustment

Typical use cases

Use these binoculars as a compact travel optic, for outdoor events, or as a general-purpose pair for everyday observation. The waterproof construction and protective rubber armouring support use in varied outdoor conditions while maintaining a comfortable viewing experience with pull-up eyecups.

Pentax UP 25 – FAQ

Question: Is the Pentax UP 25 waterproof?
Answer: Yes. The Pentax UP 25 is rated Waterproof JIS Class6, as stated in the product information.

Question: What magnification and objective size does this model have?
Answer: This model is 10x25, meaning it has 10x magnification with a 25 objective lens diameter.

Question: What prism and coatings are used in the optics?
Answer: The binoculars use an inverted porro prism design with high-quality BaK4 prisms and new fully multi-coated optics. They also include aspherical lens elements for edge-to-edge sharpness.

Question: How can I adjust the binoculars to fit my eyes?
Answer: The UP 25 features a dual-axis, single-body design with synchronized eyepiece IPD adjustment, pull-up eyecups for eye relief, and a centrally-located lockable diopter adjustment to fine-tune focus.