The SVBONY SV245 8–16mm Zoom Eyepiece is a high-quality parfocal zoom eyepiece designed for astronomers who want flexibility, precision, and optical clarity without the inconvenience of swapping eyepieces. Covering a practical 8mm to 16mm focal length range with a maximum apparent field of view of 63°, the SV245 is well suited to lunar, planetary, and brighter deep-sky observing.
Key Features
- 8–16mm parfocal zoom eyepiece for versatile visual observing
- Wide apparent field of view up to 63° for immersive views
- Precision click-stop zoom mechanism for repeatable magnification
- Advanced multi-element optical design with fully multi-coated lenses
- Long eye relief suitable for eyeglass wearers
- Dual 1.25" and 2" barrel compatibility
- Support for astigmatism corrector installation
Tip: The SV245 zoom eyepiece is fully compatible with the SVBONY SA401 APO and SV406P spotting scopes, where it can significantly enhance image sharpness, contrast, and wide-angle viewing performance.
| Brand | SVBONY |
| Model | SV245 |
| Focal Length | 8–16mm |
| Apparent Field of View | Up to 63° |
| Barrel Size | 1.25" & 2" |
| Optical Coatings | Fully Multi-Coated |
| Lens Edge Blackening | Yes |
| Eye Relief | 17–18mm |
| Parfocal | Yes |
| Click-Stop Zoom | Yes |
| Astigmatism Corrector Support | Yes |
| Barrel Material | Stainless Steel (1.25") / Aluminium Alloy (2") |
| Filter Threads | M28.5 × 0.6 & M48 × 0.75 |
| Optical Design | 5 Groups / 8 Elements |
| Weight | Approx. 486g |
| Dimensions | 129 × 60mm |
Advanced Multi-Element Optical Design
The SV245 features a carefully engineered 5-group, 8-element optical system with fully multi-coated glass. This design improves light transmission, contrast, and colour fidelity, delivering sharp, high-contrast views across the entire zoom range with minimal aberrations.
Comfortable Long Eye Relief
With a generous 17–18mm eye relief, the SVBONY SV245 allows comfortable viewing even for eyeglass wearers. The viewing position remains relaxed at all focal lengths, making the eyepiece ideal for extended observing sessions.
Precision Click-Stop Zoom Control
The integrated click-stop zoom mechanism provides positive detents throughout the 8–16mm range. This ensures smooth, precise magnification changes with no free play, allowing observers to fine-tune magnification quickly and confidently, even in low-light conditions.
Build Quality & Compatibility
Constructed with a stainless steel 1.25" barrel and an aluminium alloy 2" barrel, the SV245 offers excellent durability and secure fitment. Standard filter threads allow easy use of lunar, planetary, and light pollution filters.
Who Is This Eyepiece For?
The SVBONY SV245 is an excellent choice for astronomers seeking a high-quality zoom eyepiece that balances convenience, optical performance, and viewing comfort. It is particularly well suited to lunar and planetary observation, outreach sessions, and observers who prefer a single versatile eyepiece over multiple fixed focal lengths without sacrificing sharpness or contrast.
