Product details

Optical specifications

Model: MY-ZT0058 (BOSSDUN Ultra ED)
Magnification: 12x
Objective Lens Diameter: 50 mm
Prism Type & Glass: Roof Prism, BAK4
Lens Coating: Fully Multi-Coated (FMC) with Dielectric Coating & Phase-Corrected Coating (Anti-Reflective / High-Transmission)
Field of View (FOV): 6.5° (347 ft / 1000 yds | 114 m / 1000 m)
Exit Pupil Diameter: 4.17 mm
Eye Relief: 16.8 mm
Close Focus: 2.0 m (6.6 ft)
Optical System: 8 elements in 6 groups (with ED Ultra-Low Dispersion Glass)
Waterproof Rating: IPX8 (Nitrogen-Purged, Fog-Proof)
Focus System: Smooth Center Focus Wheel
Diopter Adjustment: Right Eyepiece (±5D)
Eyecup Type: Twist-Up Eyecups
Body Material: Engineering Polycarbonate ("Plastic Steel") chassis with non-slip rubber armor
Dimensions: 135 mm × 167 mm × 64 mm (5.3 in × 6.6 in × 2.5 in)
Net Weight: 900 g (31.7 oz / 1.98 lbs)

FAQs

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What is the 12x50 ED model best suited for?

Its 12x magnification and 50 mm ED objectives are designed for detailed long-range viewing, including birding, hunting, and low-light observation. For extended viewing, bracing your arms or using support can improve stability.

Is it waterproof and fog-resistant?

Yes. It is rated IPX8 and nitrogen-purged to help prevent internal fogging in wet or rapidly changing outdoor conditions.

How do shipping, returns, and warranty work?

Standard shipping is free to supported destinations and typically takes 5–12 business days after 1–2 business days of handling. You may request a return within 30 days of delivery, and the product includes a 1-year limited warranty.

Can I use it while wearing glasses?

Yes. The 16.8 mm eye relief and twist-up eyecups are designed for comfortable viewing with or without glasses.

Does it need a tripod?

It can be used handheld, but 12x magnification makes movement more noticeable. For long observation sessions or maximum detail, a tripod or other steady support is recommended.