ED Glass Objective Lenses
Extra-Low Dispersion (ED) glass virtually eliminates chromatic aberration, also known as color fringing, a distracting visual effect produced when different wavelengths of light disperse while transiting optical lenses. By reducing dispersion, the Regal ED binoculars provide images with outstanding, true-to-life color. But not all ED binoculars are created equal. Celestron’s high quality ED glass objective lenses deliver visibly brighter, sharper images compared to non-ED binoculars. The difference is especially apparent in low light conditions, such as at dawn or dusk.
Flat Field Technology
In addition to using ED glass, the Regal features flat field optical technology that counter-balances the normal visual field curvature convex lenses naturally show, delivering an expansive linear image all the way to the edges of the field of view.
Coatings and Prisms
Regal ED features fully multi-coated optics. A binocular can be considered “fully multi-coated” when all air-to-glass surfaces are coated with multiple layers of anti-reflectivity coatings so that the maximum amount of light passes through the glass to the eye. The prisms inside Regal ED are made of high quality BaK-4 glass with phase coatings applied so that more light is reflected off their internal faces and passes through to the eye. Taken together, the fully multi-coated lenses and BaK-4 prisms maximize light transmission for the remarkably bright, highly detailed images. The ED objective lenses further enhance these features, especially in low light conditions.
The well-balanced, ergonomic industrial design magnesium alloy body protects your Regal ED binoculars from damage without weighing you down. Viewing through Regal ED is comfortable for both eyeglass wearers and non-eyeglass wearers, thanks to the durable metal twist-up eyecups. Twist through multiple click stops to find the position that works best for you. What’s more, the binocular is fully waterproof and filled with dry nitrogen gas to prevent internal fogging of lenses. Regal ED can stand up to even the toughest outdoor conditions.
Perfect for a Variety of Uses
Regal ED 8x42mm features a close focus of just 4.9 feet, making it perfect for viewing birds, butterflies, plants, or other nearby subjects. For distance viewing, the 8x42 model offers a wide field of view so you can easily follow subjects as they move with less need to move the binoculars.
Ways to Observe
Carry your Regal ED with the included padded strap or on the cross-body carry harness for additional comfort. It’s also tripod-adaptable, so you can mount it on any standard photographic tripod for extended viewing or digiscoping (photography through the eyepiece). A tripod adapter is sold separately. The included one-piece eyepiece cover keep rain, dust, and other substances off your eyepiece lenses in the field and protect them while in storage, while the tetherable objective covers provide additional protection for the Regal’s all-important objective ED lenses.
- Magnification: 8x
- Objective Lens Diameter: 42mm
- Angular Field of View: 8°
- Linear Field of View (@1000yds / @1000m): 420 ft (140 m)
- Exit Pupil: 5.2mm
- Eye Relief: 22.5mm
- Close Focus: 4.9 ft (1.5 m)
- Interpupillary Distance (max): 74mm (2.91")
- Interpupillary Distance (min): 56mm (2.20")
- Diopter Adjustment Range: ±2
- Twilight Factor: 18.33
- Relative Brightness: 27.04
- Limiting Stellar Magnitude: Ideal: 10.62 Moderate: 9.62 Poor: 8.62
- Lens Coatings: Fully Multi-Coated
- Prism Glass (Type): BaK-4
- Prism Coating: Phase and Dialectric Coated
- Weight: 27.1 oz (768 g)
- Environmental Protection: Waterproof
- Nitrogen Filled: Yes
- Tripod Adaptable: Yes
- Carrying Case: Black woven cloth covered hard case, zipper closure, with detachable, adjustable shoulder strap
- Dimensions: 152mm x 130mm x 57mm (5.9" x 5.1" x 2.2")
- Included Items: Carrying Case, Objective Lens and eyepiece Caps, Neck Strap, Carrying Harness, Lens Cloth, Quick Start Guide