- Continuous focal length zoom of 7mm to 21 mm for a wide range of magnification without the need to switch eyepieces
- Parfocal over entire range, so no need to refocus as focal length is changed
- Multi-coated optics for bright and high-contrast views
- Long eye relief of 16-33 mm for comfortable viewing position, even for eyeglass wearers
- Threaded to accept standard 1.25” filters
There are a number of things that you will thoroughly enjoy as an owner of this "StarGuider" 7-21mm 1.25” zoom eyepiece.
You’ll enjoy the high quality par-focal range which allows an observer to easily transition from low to high powered viewing without changing eyepieces! The knurled rubber grip and non-click stop adjustment mechanism will ensure that the observer can smoothly find the best magnification and field of view that the target object and seeing conditions will allow. In addition, a 30 to 43 degree field of view range combined with very generous eye-relief and a foldable rubber eyeguard makes this eyepiece well suited for eyeglass wearers and non-eyeglass wearers alike! The eyepiece is threaded to accept standard 1.25" astronomy filters.
Made with high quality multi-coated optics, this eyepiece will be providing high contrast views and unparalleled ease of use for years to come.
|Barrel Size||1.25" (31.7mm)|
|Apparent Field of View (Mfg Specified)||43° at 7mm - 30° at 21mm|
|Eye Relief (Designed)||16-33mm|
|Filter Threads||Standard 1.25" Filter Thread (M28.5 x 0.6)|
|Barrel Safety Recess||Yes|
|Barrel Type||With safety undercut|
|Protective Plastic Storage Container||Yes - Free Agena Eyepiece Container|
|Protective Plastic Storage Container Size||Agena 52x80mm|
|Rubber Eye Guard||Yes|
|Country of Manufacture||China|