SVBONY SV135 Zoom Eyepiece for Astronomers, 7 to 21mm 1.25 Inch

Product Overview of the SV135 Zoom Eyepiece

The SV135 zoom eyepiece redefines your stargazing experience by allowing you to transition effortlessly between low and high magnification. With a focal length range of 7 mm to 21 mm, this fully multi-coated zoom plossl eyepiece enables you to select the ideal magnification tailored to your observation needs. Especially designed for beginner astronomers, it provides a linear continuous zoom that enhances your viewing capabilities.

User-Friendly Zoom Mechanism

The zoom feature of the SV135 is engineered for precision. It is firm enough to prevent accidental changes to focal lengths, yet operates smoothly, allowing for seamless adjustments with one hand. This ensures that your observations are easy and enjoyable, even while wearing glasses, offering a comfortable viewing experience.

Clarity and Brightness

With an impressive eye relief of 18 mm to 16.3 mm and a field of view ranging from 40° to 57°, the SV135 offers a clear and bright perspective for users. This design not only enhances comfort for extended stargazing sessions but guarantees the necessary magnification to focus on the celestial wonders.

Versatile Observation Capabilities

The SV135 comes equipped with M28.5*0.6 filter threads, making it simple to attach filters for enhanced photography. Its high-performance optical construction includes a fully multi-coated (FMC) system, incorporating six elements in four groups. This premium design allows for light transmission of up to 97%, significantly reducing light loss during observations.

Technical Specifications and Features

• Focal Length: 7-21mm
• Lens Structure: 6 elements in 4 groups
• Interpupillary Distance: 15mm
• Field of View: 57–40°
• Rubber Eye Guard: Yes
• Thread Size: M28.5*0.6
• Net Weight: 133g (4.67oz)
• Material: Metal
• Zoom Type: Linear
• Eye Relief: 18mm - 16.3mm
• Barrel Size: 1.25"
• Coatings: Fully Multi-Coated - Green
• Overall Length: 93mm

Perfect for Various Observations

With its adjustable focal length, the SV135 effectively functions as multiple eyepieces in one, providing higher magnification with a shorter focal length. This versatility allows you to delve deeper into the observation of celestial bodies such as Venus, Jupiter, Saturn, and even for bird watching and deep-sky visuals.

Exceptional Optical Performance

Compared to standard PLOSSL eyepieces, the SV135 stands out with superior edge and center sharpness due to its premium six-element optical design. Its rubber eyecup accommodates comfort while blocking stray light, and its standard 1.25-inch barrel fits any telescope compatible with this size.

Cost-Effective and High-Quality Viewing

This eyepiece is not just effective but also cost-efficient. The full metal body features an attractive appearance alongside a wide angle view that ranges from 40° to 57°, ensuring bright and detailed observations, enhancing your stargazing adventures like never before.

In conclusion, the SV135 zoom eyepiece is an excellent addition to any amateur astronomer's toolkit, offering a range of functionalities, comfort, and outstanding optical qualities. Whether you're exploring lunar landscapes, planets, or distant nebulae, the SV135 equips you with the tools needed for an enriched observational experience.

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