Celestron Omni Series 1.25 in - 4mm
The 4 mm high power Omni 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.
Threaded barrels accept 1-1/4" Celestron thread-in filters.
The Omni Plossls represent the peak performance for all 4 element Plossls of this type, due to their coating, internal baffling and quality control.
FOCAL LENGTH: 4 mm (0.16 in)
EYE RELIEF: 6 mm (0.24 in)
ANGULAR FIELD OF VIEW: 52 °
SIZE: 1.25 in (31.75 mm)