CELESTRON TrailSeeker ED 8X42 Roof Binocular BaK-4
- Extra-low dispersion (ED) glass elements reduce chromatic and spherical aberrations to produce views with true color rendition without halos, diffraction, or distortion across the entire field of view
- Fully multi-coated optics for maximum light transmission through the optical path
- Phase and dielectric coated BaK-4 prisms for vivid, true-to-life colors
- Wide field of view and 2.5 Meter close focus
- Nitrogen filled and O-ring sealed to be waterproof and resistant to internal fogging when moving though extreme temperature and environmental conditions
- BAK4 prisms deliver a round exit pupil and a crisp and clear image with limited edge distortion
- Light and durable magnesium chassis
- Tripod adaptable
- Made by Celestron, USA
Description
The 8x42 TrailSeeker ED binocular provides high-level outdoor performance—a perfect choice for avid birders, hunters, and outdoor enthusiasts. TrailSeeker ED 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. 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
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 TrailSeeker ED 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.
The Body
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. TrailSeeeker ED can stand up to even the toughest outdoor conditions.
Viewing through TrailSeeker ED 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 for a Variety of Uses
TrailSeeker ED features a close focus of just 2.5 Meter, making it perfect for viewing birds, butterflies, plants, or other nearby subjects. But this 10x42 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.
Ways to Observe
TrailSeeker ED 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 digiscoping sessions. (Tripod adapter sold separately.) The binocular also includes a protective soft case for storage or transport.
Video
 CELESTRON TrailSeeker
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Specifications
| Magnification |
8x |
| Objective Lens Diameter |
42mm (1.65") |
| Angular Field of View |
8.1° |
| Linear Field of View (@1000 yds) / @1000 m) |
426ft (142m) |
| Exit Pupil |
5.2mm (.20") |
| Eye Relief |
17.2mm (.67") |
| Close Focus |
6.5 ft (2.16 m) |
| Interpupillary Distance (max) |
74mm (2.91") |
| Interpupillary Distance (min) |
56mm (2.20") |
| Diopter Adjustment Range |
± 3 |
| Twilight Factor |
17.8 |
| Relative Brightness |
27.04 |
| Lens Coatings |
Fully Multi-Coated |
| Prism Glass (Type) |
Bak-4 |
| Prism Coatings |
Phase & Dielectric Coated |
| Weight |
23.5 oz (666 g) |
| Environmental Protection |
Waterproof |
| Nitrogen Filled |
Yes |
| Tripod Adaptable |
Yes |
| Carrying Case |
Soft Case |
| Dimensions |
139.7mm x 124.46mm x 50.8mm (5.5" x 4.9" x 2") |
| Accessories included in the Box |
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| Included Accessories |
Objective Lens & Eyepiece Caps | Neck Strap | Carrying Harness |Lens Cloth | Instruction Manual |
LIMITED LIFETIME WARRANTY
Limitations of Normal Wear and Tear
Product exteriors (rubber or other material) are fully covered for five years against defects in materials and workmanship but small scratches or blemishes are not covered.
Included accessories such as lens caps/covers, eyecups, cases/pouches, and straps are fully covered for two years against defects in materials and workmanship, but are not covered for accidental loss.
Over time, optical coatings may develop small blemishes through normal wear and tear or abuse under various environmental conditions. These are not covered and the determination is at the sole discretion of Celestron.
Other Limitations Not Covered
The basic optical system is covered for the useful life of the product for the original owner.
Collimation and optical alignment issues must be claimed within 30 days of purchase.
Loss of the product or of lens caps/covers, eyecups, cases/pouches, or straps are not covered.
