1. Focal length: 8mm-20mm
2. Field of view: 57-72 degrees
3. Lens size: 1.25 inches and 2 inches
4. Pupil exit distance: 17-19mm
5. Barrel material: stainless steel
6. Filter thread: M28.5x0.6 and M48x0.75
7. Number of groups/elements: 6/9
8. Outer diameter: 60mm
9. Height: 132mm
10. Net weight: 500g

Features:
1. Day and night use, supports excellent resolution and contrast values as well as clear images in a large field of view
2. Flush focus throughout the entire zoom range, virtually eliminating the need to refocus when changing magnification
3. Wide focal length range allows use on many instruments, whether on compact APOs, DOBs, or fast Newtonian telescopes
4. 9-element (including aspherical), multi-layer coated optics for excellent sharpness, contrast and color correction
5. Smooth zoom action with stops at 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 24mm
6. 72-degree field of view at 8 mm, 57-degree field of view at 20 mm
7. 17-19mm eye relief and adjustable rubber eyecups for comfortable viewing with or without glasses, up to 60mm in diameter, allowing use on binocular attachments
8. Includes 1.25-inch and 2-inch lens barrels with threads for filters

Packing List:
- Eyepiece x 1
- Soft bag x 1
- Dust cover x 3