SVBONY SV230 8-20mm Super Zoom Aspheric Eyepiece - 1.25"

Parfocal 8-20mm Zoom: One Eyepiece, Multiple Magnifications

This eyepiece's core feature is its continuous 8mm to 20mm zoom range. You can seamlessly transition from low-power wide fields to high-power planetary detail without ever swapping eyepieces. Because the SV230 is parfocal, there's no need to refocus after changing magnification, allowing you to track moving objects or adjust for changing seeing conditions instantly.

Sharp Fields from 8mm to 20mm: Aspheric Optical Design

Svbony integrated aspheric lens elements and an astigmatism corrector into the SV230's design to deliver sharp, high-contrast views across the entire field. This advanced optical formula minimizes the edge distortion and field curvature often seen in conventional zoom eyepieces. The result is a clear, immersive view where stars remain tight points from the center to the field stop, regardless of the selected focal length.

Built for Comfort and Compatibility: 17-19mm Eye Relief and Dual Barrels

With a generous 17-19mm of eye relief, the SV230 is comfortable for all observers, including those who wear glasses. The included adapter allows the eyepiece to be used in both 1.25" and 2" focusers, ensuring compatibility with virtually any telescope. While its 500g weight reflects a robust optical and mechanical construction, be sure to check your focuser's capacity and your telescope's balance.

• Dual Fit Barrels: Use the native 1.25" barrel for smaller telescopes or attach the included 2" adapter for larger focusers, providing maximum flexibility.
• Long Eye Relief: The 17-19mm eye relief allows you to see the full field of view comfortably with or without eyeglasses, reducing eye strain during long sessions.
• Camera Ready: The rubber eyecup can be removed to reveal a T-mount thread, allowing for direct connection of a DSLR or mirrorless camera for afocal astrophotography (requires a separate T-adapter).

The 8-20mm SV230 Zoom vs. Fixed Eyepieces: Convenience and Parfocal Design

While a set of premium fixed-focal-length eyepieces might offer a wider apparent field of view at specific magnifications, they cannot match the operational simplicity of the SV230 zoom.

• Fixed Eyepiece Advantage: Individual eyepieces are often lighter and can be optimized for a single, wider apparent field of view.
• SV230 Zoom Advantage: The SV230 offers the power of four or five eyepieces in one. Its parfocal nature eliminates constant refocusing, making it ideal for outreach events, tracking objects like the International Space Station, or for observers who value efficiency and want to minimize handling gear in the dark.