Celestron 8x42 Ultima Porro Binoculars are a general-purpose optic for mid- to long-range use, even in challenging lighting conditions.
The large lenses draw in a generous amount of light and, combined with 8x power, translate to a wide exit pupil that will completely cover most pupils in low-light conditions, such as those 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 that is defined by bright, clear high-contrast views with accurate color rendition and a rich depth of field.
For long-duration glassing sessions, to reduce arm fatigue, or to eliminate vibrations, the Ultima 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, and it chassis is made of a lightweight and durable aluminum alloy and wrapped in a protective slip-resistant synthetic rubber armor. Fold-down rubber eyecups mold themselves to your eye sockets to block stray peripheral light for brighter views without intrusive side glare, and the binoculars' center-focusing wheel is also slip resistant to make precision focusing fast and easy.
Porro prism binoculars provide an enhanced three-dimensional image of the subject
Wide 7.5° field of view allow you to see the entire scene all at once
BaK-4 prisms and fully multi-coated optics deliver maximum light transmission through the optical path
13' close focus for detailed observation of subjects in close proximity
Ergonomic body with synthetic rubber armor and a non-slip grip
Tripod adaptable for extended viewing sessions
Eyeglass friendly with generous eye relief and comfortable rubber eyecups
Objective Lens Diameter: 42mm (1.65")
Angular Field of View: 7.5°
Linear Field of View (@1000 yds) / @1000 m): 393 ft (131 m)
Exit Pupil: 5.3mm (0.21")
Eye Relief: 18mm (0.71")
Close Focus: 13.1ft (4m)
Interpupillary Distance (max): 74mm (2.91")
Interpupillary Distance (min): 50mm (1.97")
Diopter Adjustment Range: ±4
Twilight Factor: 18.33
Relative Brightness: 28
Lens Coatings: Fully Multi-Coated
Prism Glass (Type): BaK-4
Prism Coatings N/A
Weight: 21.9 oz (620 g)
Environmental Protection: Waterproof
Nitrogen Filled: Yes
Tripod Adaptable: Yes
Carrying Case: Black woven fabric case with hook-and-loop closure flap
Dimensions: 140mm x 175mm x 52mm (5.5" x 6.9" x 2.0")
Kit content Celestron 8x42 Ultima Binoculars Case Neckstrap Eyepiece covers Tethered objective covers
For more information about, Celestron 8x42 Ultima Binoculars website.