Celestron Ultima 10x42mm Porro Prism Binoculars

Combining high magnification and large objectives, the Celestron 10x42 Ultima Porro Binoculars are an ideal optic for making detailed observations of distant subjects, even in challenging lighting conditions.

The large lenses draw in a generous amount of light and, combined with 10x power, translate to a comfortable exit pupil that will completely cover most pupils in low-light condition at dawn or dusk and when peering into heavy brush or canopies. Complementing these performance features are anti-reflection fully coated optics, a wide field of view, and a traditional Porro prism optical path that all work together to produce an immersive and comfortable observational experience defined by bright, clear high-contrast views with accurate colour rendition and a rich depth of field. The wide field of view also helps to mitigate the appearance of visible handshake that is common with higher power optics, for clearer views.

For long-duration glassing sessions, to reduce arm fatigue, or to eliminate vibrations, this Ultima binocular can be tripod mounted using an optional adapter. The optical tubes are nitrogen-filled and O-ring sealed to be waterproof and resistant to internal fogging. The chassis is made of a lightweight and durable aluminium alloy and wrapped in a protective slip-resistant synthetic rubber armour. Fold-down rubber eyecups mould themselves to your eye sockets to block stray peripheral light for brighter views without intrusive side glare, and the binoculars' centre-focusing wheel is also slip-resistant to make precision focusing fast and easy.

Optical Performance

Powerful 10x magnification enables detailed observations of distant subjects

42mm objective lens diameter provides competent low-light performance without adding excessive bulk and weight for easier handling

Traditional Porro prism optical path presents a rich depth of field to produce lifelike views

BAK4 prism glass delivers a round exit pupil and a crisp and clear image with limited edge distortion

Anti-reflection fully coated optics improve light transmission, colour rendition, clarity, and contrast

Wide 65° apparent angle of view reduces the appearance of distracting hand shake that is common with high-power optics while presenting a spacious view that won't require a lot of side to side head movement to see

343-foot field of view at 1000 yards

Use and Handling

The slip-resistant centre-focusing wheel is easy to manipulate, even when wearing gloves

±4 right-eye dioptric correction range enables precise focusing even for those who normally require corrective eyewear

50-74mm interpupillary distance adjustment range enables easy use by a wide variety of people

Fold-down rubber eyecups for comfortable use with or without eyewear

Integrated 1/4"-20 mounting socket for an optional tripod adapter to limit arm fatigue and vibrations

15mm eye relief increases viewing comfort and reduces eyestrain, especially during long glassing sessions

Comfortable 4.2mm exit pupil will cover most pupils as they open and dilate in low light and ensures the entire scene remains in view without vignetting

Construction Details

Lightweight and durable aluminium-alloy chassis

Nitrogen filled and O-ring sealed to be waterproof to an IPX6 rating and resistant to internal fogging when moving through extreme changes in temperature and environmental conditions

Protective synthetic rubber armour provides a slip-resistant grip

Tethered objective lens caps offer additional lens protection without the risk of losing them during use