Regal**ED**10 x 42 binocular 71391

Regal ED 10x42mm Roof Binoculars

Item #: 71391

• Extra-Low Dispersion (ED) objective lenses provide high resolution, high contrast images that are virtually free of optical defects such as chromatic aberration (color fringing)
• Flat field technology ensures level, edge-to-edge image clarity
• Fully multi-coated optics deliver maximum light transmission throughout the optical path.
• Phase and dielectric coated BaK-4 prisms produce vivid, true-to-life colors.
• Eyeglass friendly - generous eye relief and sturdy, twist-up eyecups with multiple stops
• Well-balanced, ergonomic industrial design
• 4.9’ close focus
• Tripod adaptable

Regal ED Flat Field Binoculars build on the success of Celestron’s customer-favorite Regal ED spotting scope line. With both ED objective lenses and flat field lenses, these binoculars provide sharp, expansive views and of a high degree of accurate color resolution.

As Celestron’s new premiere line of performance-level field binoculars, the Regal ED Flat Field Binoculars are designed with the most selective of all binocular users in mind: birders. From their vivid, true-to-life color resolution, expansive fields of view for ease of locating fast moving objects, and 4.9 foot close focus distance to get an even closer look when a subject suddenly pops out of the bushes and right on the trail in front of you, the Regal ED binoculars provide everything needed for the most selective of binocular users – which ensures that they’re up to the challenge across a wide-range of other activities.

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 Body

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 10x42mm 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 10x42 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.  The binocular also includes a premiere quality hard shell case for secure storage and transport.

General              

Magnification: 10x

Objective Lens Diameter:          42mm (1.65")

Angular Field of View:  6.5°

Linear Field of View (@1000yds / @1000m):     340 ft (113 m)

Exit Pupil:           4.27mm (.16")

Eye Relief:          20.2mm (.79")

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: 20.49

Relative Brightness:      17.64

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

Solar Warning 

Never look directly at the Sun with the naked eye or with this optic. Permanent and irreversible eye damage may result.

Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.

Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.