Celestron's 8x42 TrailSeeker ED binocular (8x power with 42 mm Aperture objectives) provides high-level outdoor performance—a perfect choice for avid birders, hunters, and outdoor enthusiasts. It is packed with optical, mechanical, and ergonomic features that make it comparable to binoculars costing two to five times as much. 

ED Objective Lenses

Extra-Low Dispersion (ED) glass virtually eliminates chromatic aberration, also known as color fringing, a visual defect common in binoculars. The TrailSeeker ED delivers edge-to-edge sharpness with excellent color correction and razor-sharp images.

Not all ED glass is created equal. Celestron's high-quality ED glass delivers visibly brighter, sharper images compared to non-ED binoculars. The difference is especially apparent in low light conditions, such as at dawn or dusk.

Coatings and Prisms

The TrailSeeker ED features fully multi-coated optics and phase- and dielectric-coated BaK-4 prisms. 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 prism inside this binocular is made of high quality BaK-4 glass with both phase and dielectric coatings so that more light is reflected off the prism and diverted through the eye. Taken together, fully multi-coatings and BaK-4 prisms maximize light transmission for the brightest, most detailed images possible.

Durable and Ergonomic Body Design

Celestron's TrailSeeker ED is composed of lightweight and durable magnesium alloy. Its tough, rigid frame is coated with rubber to stand up to hard use in the field. What’s more, the binocular is fully waterproof and filled with dry nitrogen gas to prevent internal fogging of lenses. It can stand up to even the toughest outdoor conditions.

Viewing through this binocular is comfortable for both eyeglass wearers and non-eyeglass wearers alike, thanks to the durable twist-up eyecups. Twist through multiple click stops to find the position that works best for you.

Perfect Bincoulars for Birding, Hunting, and More

TrailSeeker ED features a close focus of just 8.2 feet, making it perfect for viewing birds, butterflies, plants, or other nearby subjects. But this 8x42 binocular also offers the magnification needed to get great views of distance subjects, plus a wide field of view so you can easily follow them as they move. No matter how you choose to observe, this versatile binocular is an excellent all-around performer.

This TrailSeeker ED also includes both a neck strap and a carrying harness so you can choose the option that’s most comfortable for you. It’s also tripod adaptable, so you can mount it on any standard photographic tripod for extended viewing or digital-scoping sessions. (Tripod adapter sold separately.) The binocular also includes a protective soft case for storage or transport.

Highlighted Specs of Celestron TrailSeeker ED 8x42 Binoculars

• Twilight Factor: 17.8
• Relative Brightness: 27.04
• Nitrogen Filled: Yes
• Dimensions: 139.7 mm x 124.46 mm x 50.8 mm (5.5" x 4.9" x 2")

• Perfect binoculars for birding, hunting, nature-watching, or stargazing.
• ED Objective Lenses 
• Magnesium Alloy Construction
• BaK-4 Glass with Phase and Dielectric Coatings
• Wide Field-of-View and 8.2-foot Close Focus
• Tripod Adaptable

• Binocular
• Case
• Lens and Objective Caps and Covers
• Neck Strap
• Lens Cloth
• Small Things Ditty Bag
• Carrying Harness (designed to allow you to use your shoulders and torso instead of just your neck to support the weight of the binoculars)
• Instruction Manual