Sky-Watcher Zoom 8-24mm 1.25" Eyepiece
The Sky-Watcher Zoom 8-24mm is a variable focal length eyepiece that replaces an entire set of fixed eyepieces with a single, compact accessory. One turn of the zoom ring takes you smoothly from a comfortable 24mm wide-field view all the way down to a high-magnification 8mm view - with the object remaining in the field of view throughout the entire adjustment. No swapping, no trial and error, no searching for the right eyepiece in the dark. You simply turn and observe.
Optical quality for beginners and experienced observers alike
The optical system consists of 8 elements - an above-average count for a zoom eyepiece that translates directly into better image quality. Distortion is minimal across the full zoom range and remains practically unnoticeable even on fast telescopes at f/5 - including aplanatic reflectors and short-focus ED refractors, where eyepiece aberrations are more pronounced than on slower instruments. Contrast and edge sharpness throughout the field reflect the standards associated with Sky-Watcher, a brand with a long-established reputation in amateur astronomy optics.
The apparent field of view ranges from 40° at 24mm to 57° at 8mm. The 57° figure at the high-magnification end is above average for a zoom eyepiece and means that even at its shortest focal length you still have a generous field of view around the object - making it easier to keep a planet or double star centred during tracking.
Day and night use
Unlike most astronomical eyepieces, the Sky-Watcher Zoom 8-24mm is fully suitable for daytime observation. Paired with a spotting scope or telescope on a tripod, it works well for birdwatching, landscape observation and monitoring distant objects. The image is sharp and colour-accurate in daylight, making this a genuinely versatile instrument for observers who use their telescope around the clock.
Comfortable viewing for everyone
Long eye relief allows comfortable observation with eyeglasses on - the eye does not need to press tightly against the eyepiece to see the full field of view. The standard 1.25" filter thread accepts lunar, polarising and other astronomical filters without any additional adapter. The eyepiece fits all 1.25" focuser drawtubes, the most widely used standard size in amateur astronomy today.
Specifications
| Parameter |
Value |
| Focal length |
8-24 mm (continuously variable) |
| Apparent field of view |
40° (at 24mm) - 57° (at 8mm) |
| Number of elements |
8 |
| Barrel diameter |
1.25" |
| Filter thread |
Yes (1.25") |
| Suitable for eyeglass wearers |
Yes |
| Daytime use |
Yes |
| Type |
Zoom eyepiece |
Whether you are equipping your first telescope and want one eyepiece that covers everything, or you are an experienced observer who wants a reliable all-in-one tool ready to hand before reaching for a specialist eyepiece, the Sky-Watcher Zoom 8-24mm is a proven and dependable choice that delivers genuine optical performance across its full range.
