Pentax UP 8-16x21 Black Binoculars - Porro

Pentax UP 8-16x21 Black Binoculars - Porro bring compact, high-magnification viewing in a classic Porro-prism design for the outdoors and travel.

These Pentax UP binoculars offer a variable 8–16x magnification range with a 21 mm objective diameter, giving a powerful 16x option when you need to bring distant subjects closer. The Porro prism layout delivers a traditional optical path that maximizes depth and perceived contrast in the field.

Optical performance is defined by a 1.3 mm exit pupil and a real field of view of 3°, corresponding to 51.79 m at 1000 m, which helps you frame distant scenes even at the highest magnification. The center focus mechanism allows quick, intuitive adjustment to keep subjects sharp.

Physically the binoculars are compact and travel-friendly: they measure 145 mm (width) × 140 mm (height) × 78 mm (depth) and weigh 500 g. A carrying case is included, and tripod mounting is supported for long observation sessions or steady, high-magnification viewing.

Note the Pentax UP is not waterproof, and eye relief is 1.1 cm with a closest focusing distance of 3.02 m, so it is best suited for daytime outdoor use, birdwatching at distance, sports spectating, and landscape observation rather than harsh weather or eyeglass-intensive use.

Made in China, these binoculars balance portability and power for users who need reach without bulk. The black finish gives a discreet, professional appearance that fits many activities.

Typical use cases include long-range birdwatching, coastal or marine observation from a sheltered position, stadium events, and guided nature walks where compact, high-magnification optics are required. With tripod support, they are also suitable for astrophotography or lunar observation when mounted securely.

Key features at a glance:

• Magnification: 8–16x with 21 mm objectives
• Field of view: 3° (51.79 m at 1000 m) and exit pupil 1.3 mm
• Compact and lightweight: 500 g with tripod mounting and included carrying case