SV215 3–8mm Planetary Zoom Eyepiece
- Designed for planetary observation: Ideal for viewing and imaging Venus, Mars, Jupiter, Saturn and more. A reliable choice for amateur astronomers.
- 3–8mm adjustable focal length: Replaces multiple fixed eyepieces. Zoom in and out without swapping lenses.
- Parfocal across the zoom range: Only minimal focus adjustment required as you change focal length.
- Constant performance: Apparent field of view and eye relief remain consistent while zooming.
- Click-stop indexing: Easy to locate set zoom positions by feel — especially useful when observing in the dark.
- Smooth zoom ring: Gradual and precise control when adjusting magnification.
- Optical quality: 6-element / 4-group design with fully multi-coated lenses for sharp, high-contrast, well-corrected views.
Specifications at a Glance
| Focal Length | 3–8mm (variable) |
| Optical Layout | 6 elements in 4 groups |
| Coatings | Fully multi-coated |
| Application | Planetary, lunar and high-magnification observing |
Note: Not suitable for spotting scopes. The focal point is located inside the eyepiece body and requires a telescope with sufficient in-focus travel for proper focus.
SVBONY SV171 1.25" 18mm-24mm Zoom Lens FMC 7-Elements 4-Group Structure Zoom Eyepiece for Monocular Astronomical Telescope
Specification:
1.Brand: SVBONY 2.Model: SV171 3.Focal Length: 8-24mm 4.Eye Relief: 18-19.5mm 5.Apparent Field of View: 38°-56° 6.Barrel Size: 1.25inch 7.Lens Structure: 7-Elements/4-Groups 8.Filter Threads Standard: 1.25" Filter Thread (M28.5 x 0.6)
Package Includes:
1.1XSV171 Black 1.25in 8-24mm Zoom Eyepiece 2.2X Dust Cover 3.1XCleaning Cloth
