Celestron TrailSeeker 100-45 Degree Spotting Scope
- 100mm Objective Lens
- 22-67x Zoom Magnification
- Proprietary XLT Fully Multi-Coated Optics
- Dual-Focus Mechanism
- Waterproof and Nitrogen-Purged
- Rotating Tripod Mount for Adjustable Viewing Angles
The Celestron TrailSeeker 100-45 Degree Spotting Scope combines a massive 100mm objective lens with a versatile 22-67x magnification range to deliver exceptional brightness and detail. Its optical system, featuring proprietary XLT coatings on BaK-4 prisms, gathers the maximum amount of light, producing a bright 4.4mm exit pupil at its lowest power. The scope provides a linear field of view of 94 feet at 1000 yards, allowing you to easily locate and track distant subjects.
The heart of the TrailSeeker is its 100mm achromatic objective lens, an aperture that provides significant light-gathering power for clear views even at dawn and dusk. Celestron's proprietary XLT lens coatings enhance light transmission through the 540mm focal length optical path, resulting in high-contrast, high-resolution images. This optical power allows you to resolve fine details on distant wildlife or landscapes across the entire 22x to 67x zoom range.
The TrailSeeker incorporates a dual-focus mechanism, a feature typically found on more expensive scopes, for precise image control. The coarse focus knob allows for rapid, large-scale adjustments to quickly bring your subject into view, while the fine focus knob enables you to make minute adjustments for critical sharpness. This system is essential for achieving perfect focus, especially at the higher 67x magnification.
For added viewing flexibility, the tripod mount rotates, allowing you to change the orientation of the eyepiece without repositioning the entire scope. This is particularly useful for sharing views with others or for finding a more comfortable viewing angle when observing from an awkward position.
Engineered for the outdoors, the TrailSeeker features a rugged, rubber-armored housing that is fully waterproof and nitrogen-purged. This construction prevents internal fogging of the lenses during temperature changes and keeps the optics sealed from moisture, dust, and debris. Weighing 70.3 oz, the scope is substantial but manageable for field carry, especially with the included view-through soft case.
The 100mm objective lens provides superior light-gathering capability compared to smaller scopes. This results in significantly brighter images, especially in low-light conditions like dawn or dusk when wildlife is most active. It also improves image resolution, allowing you to see finer details at high magnification.
The dual-focus system gives you two focusing knobs. The larger knob provides coarse focus for making large, rapid adjustments to find your subject quickly. The smaller knob offers fine focus, allowing for very small, precise adjustments to achieve critical sharpness, which is especially important when viewing at the maximum 67x magnification.
Yes, it's an excellent choice. At 1000 yards, the field of view ranges from 94 feet (at 22x) to 47 feet (at 67x). You can use the lower 22x magnification to scan the area and locate a bird, then zoom in to 67x to observe fine details like feather patterns and coloration.
Absolutely. The 100mm aperture and up to 67x magnification are more than capable of providing detailed views of the Moon's craters and seas. Its limiting stellar magnitude of 12.5 also makes it useful for spotting Jupiter's moons and other bright celestial objects, though it is primarily designed for terrestrial viewing.
The scope comes with a T-Mount adapter. To connect your camera, you will also need a T-Ring that is specific to your camera's brand and model (e.g., a Canon EOS T-Ring or a Nikon T-Ring). The T-Ring attaches to your camera body, and then the T-Mount threads onto the T-Ring, allowing you to mount the camera to the spotting scope's eyepiece port.
No, the included soft case is a "view-through" design. This means you can keep the case on the spotting scope while it is mounted to a tripod, providing protection from the elements while you are actively observing. It has zippered openings for the objective lens, eyepiece, and focus knobs.
| Magnification | 22 - 67x |
| Objective Lens Diameter | 100mm (3.93") |
| Eyepiece Focal Length | 8mm - 24mm zoom |
| Angular Field of View | 1.8° - 0.9° |
| Linear Field of View | 94 – 47 ft @ 1000 yds (31 - 16 m @ 1000 m) |
| Focal Length | 540mm (21.26") |
| Exit Pupil | 4.4mm - 1.5mm |
| Eye Relief | 18mm - 15mm |
| Close Focus | 24.6 ft (7.5 m) |
| Twilight Factor | 47.4 - 82 |
| Relative Brightness | 19.5 – 2.25 |
| Lens Coatings | Fully Multi-Coated - XLT Coatings |
| Prism Glass | BaK-4 |
| Prism Coatings | BaK-4 |
| Environmental Protection | Waterproof, Nitrogen Filled |
| Weight | 70.3 oz (1993 g) |
| Dimensions | 566mm x 117mm x 117mm (22.3" x 4.6" x 4.6") |
| Tripod Adaptable | Yes |
| Camera Adaptable | Yes |
Balance Plate
× 1
Eyepiece Cups
× 1
T-Mount Adapter
× 1
Lens Cloth
× 1
Soft Carrying Case
× 1
Instrument Manual
× 1