Eyepiece Skywatcher Zoom 8–24 mm 1.25" — variable focal length zoom eyepiece for telescopes

Skywatcher Zoom 8–24 mm 1.25" is a variable focal length zoom eyepiece designed for 1.25" telescope focusers. It offers continuous focal lengths from 8 mm to 24 mm in a single eyepiece, enabling a wide range of magnifications without the need to swap eyepieces. The compact optical design supports planetary, lunar and many deep-sky observations, and the built-in zoom mechanism allows smooth adjustment for framing and precise focusing during visual sessions and field use.

Advantages

The zoom eyepiece provides uninterrupted magnification change across its 8–24 mm range, reducing the need to carry and change multiple eyepieces. Its 1.25" barrel ensures compatibility with common telescope focusers. The eyepiece is compact and lightweight, simplifying transport and quick setup. Smooth mechanical rotation and a clear optical path facilitate accurate framing and comfortable eye positioning for extended observing periods.

Suitable for

• Planetary observation (Moon, Mars, Jupiter, Saturn)
• Lunar surface studies and crater viewing
• Bright deep-sky objects and star clusters
• Field observing where rapid magnification changes are needed
• Beginners and hobbyists who prefer a single versatile eyepiece

Key specifications

• Focal length range: 8 mm to 24 mm (continuous zoom)
• Barrel diameter: 1.25 inches
• Optical format: variable focal length zoom eyepiece
• Use: visual observing with telescopes that accept 1.25" eyepieces
• Form factor: compact and lightweight handheld eyepiece

How to use

Insert the 1.25" barrel into the telescope focuser and secure it with the focuser's locking screw. Start at the longest focal length (24 mm) to locate and center the target, then rotate the zoom ring smoothly toward shorter focal lengths to increase magnification until the desired view is achieved. Adjust the telescope focuser for precise focus at each magnification setting. If using a finder scope or guided alignment, confirm the target is centered before making large zoom changes to maintain framing.

Usage recommendations

For best results, use the zoom eyepiece with a stable mount and allow the telescope to thermally acclimate to outdoor temperatures. Begin viewing at lower magnification to find and center objects, then increase magnification for detail. Avoid forcing the zoom ring; operate it with even pressure to maintain smooth motion and preserve mechanical longevity.