Alstar 1.25in telescope zoom eyepiece 7-21mm
A 1.25 inch zoom eyepiece with 7-21mm focal range and multi-coated optics for planetary, lunar, and deep-sky viewing. Includes extended eye relief for eyeglass wearers and a foldable eyecup for comfortable viewing
Highlights
- seamless 7-21mm zoom
- extended eye relief for eyeglass wearers
- multi-coated 7-element optics
Pros
- variable focal length 7-21mm
- extended eye relief 16-33 mm
- multi-coated optics for sharp views
- wide apparent field of view 30-43 degrees
Cons
- no explicit compatibility details beyond general telescope use
- no user reviews beyond rating provided
- no included accessories listed
Best For
Features
- Zoom range from 7mm to 21mm for flexible focal length control
- Extended eye relief 16–33 mm with foldable soft-rubber eyecup
- Wide 30–43 degree apparent field of view for planetary to deep-sky viewing
- 7-element 4-group optical system with multi-layer coatings for sharp views
- 1.25-inch barrel threads for filter compatibility and non-vignetting use
