Celestron Omni 40mm Plossl Eyepiece
|The 40mm Omni Plossl is a low power eyepiece producing the same true field of view as its 32mm cousin. This is a useful eyepiece in telescopes with a focal ratio higher than f/10. Owners of telescopes with focal ratios of f/10 or lower would be better served by a 32mm Plossl. The advantage of this eyepiece over a 32mm Plossl in slower (> f/10) optics is that it produces a larger exit pupil, which translates into a brighter image. |
The 40mm low 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" thread-in filters.