About the Celestron Omni Plossl Eyepiece - 1.25"...
The Celestron Omni Plossl Eyepiece is a 4-element premium symmetrical Plossl optical design. Features include blackened lens edges to minimize internal reflection and maximize contrast, multi-layer coating group on each lens surface to maximize light transmission and contrast, and each Omni goes through a two-step anodizing process to prevent reflection from the top eyepiece barrel, unlike most other manufactures who use reflective surfaces.
The Celestron Omni Plossl Eyepiece has threaded barrels which accept 1-1/4" Celestron thread-in filters.
Celestron 4mm Omni Plossl Eyepiece - 1.25" Features...
- 4-element premium symmetrical Plossl optical design
- Features include blackened lens edges to minimize internal reflection and maximize contrast
- Multi-layer coating group on each lens surface to maximize light transmission and contrast
- Each Omni goes through a two-step anodizing process to prevent reflection from the top eyepiece barrel
- Realistic 52 degree field of view and good eye relief
Celestron Omni Plossl Eyepiece - 1.25" Specifications...
Focal Length (mm): 4 mm (0.16 in)
Angular Field of View (deg): 52 degrees
Eye Relief (mm): 6 mm (0.24 in)
Size: 1.25 in (32 mm)
Eyepiece Elements: 4