BOSTRON
BOSTRON Spotting Scope
BOSTRON Spotting Scope
The BOSTRON Spotting Scope delivers crisp, high-definition viewing with premium BAK4 prisms and fully multi-coated (FMC) optics designed to maximize light transmission and reduce chromatic aberration. Its ergonomic angled eyepiece and smooth continuous zoom allow for fatigue-free observation across varying distances, making it ideal for bird watching, target shooting, and wildlife viewing.
Constructed with a rugged rubber-armored exterior, this optical scope features nitrogen-purged internal sealing to achieve dependable IPX7 waterproof and fog-proof performance in challenging outdoor environments. The included tripod adaptation and universal smartphone adapter allow for quick setup and stable long-range digiscoping.
Key Features
| Brand | BOSTRON |
| Model Name | CY340 |
| Product Type | Spotting Scope |
| Optical Coating | Fully Multi-Coated (FMC) |
| Prism Glass | BAK4 |
| Eyepiece Design | Plössl (Angled) |
| Focus Type | Manual Focus |
| Waterproof Rating | IPX7 Waterproof & Fogproof |
| Mount Type | Altazimuth Mount |
| Field of View | 99–48 ft / 1,000 yd |
| Dimensions | 14 in x 3.5 in x 7.5 in |
| Product Weight | 2.9 lb |
| Compatible Devices | Smartphones |




Highlights
- HIGH-DEFINITION FMC BAK4 OPTICAL SYSTEM WITH 70MM LARGE OBJECTIVE LENS: Large 70mm objective lens maximizes light intake, paired with premium BAK4 prism and FMC full multi-coated optics to cut glare, reduce chromatic aberration, and restore vivid feather/target details. Wide 99–48Ft/1000Yds field of view allows for tracking flying birds or distant shooting targets, suitable for dawn/dusk low-light outdoor observation.
- 25-75X CONTINUOUS ZOOM WITH SMOOTH MANUAL FOCUS & ANGLED EYEPIECE DESIGN: Flexible continuous zoom range covers wide-area scanning (25x) and ultra-close detail inspection (75x); angled Super Plossl eyepiece design reduces neck strain during long-hour bird watching, shooting practice, or landscape viewing. The responsive manual focus knob sharpens distant wildlife, archery targets, and moon views.
- IPX7 WATERPROOF & FOG-PROOF RUGGED RUBBER ARMOR BODY FOR ALL-WEATHER OUTDOOR USE: Built to withstand variable outdoor weather; nitrogen-filled sealed structure achieves IPX7 waterproof and fog-proof performance, resisting morning dew, light rain, and temperature changes. Features non-slip thick rubber armor.
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Materials & care
Wipe optical lenses gently with the provided microfiber cleaning cloth. Store in the carrying case when not in use and avoid abrasive cleaners on coated glass surfaces.
Compatibility
Compatible with standard tripod mounting threads and most smartphone sizes using the included universal phone adapter.
Warranty
1 Year manufacturer's warrantyWhat's included
- Tripod
- Carrying case
- Cleaning cloth
- Phone mount
Frequently asked questions
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