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4 -element premium symmetrical Plossl optical design 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, unlike most other manufactures who use reflective surfaces.
The Celestron Omni Eyepiece - 40mm offers a 43 degree apparent field of view, perfect for the Moon, planets, and a plethora of deep-sky objects. The premium four-element optical set is finished with multiple layers of high-transmission coatings for clear, sharp images. The edges of the optics are blackened for increased contrast.
The Omni eyepiece body is made of aluminium. A two-step anodizing process results in a beautiful matte finish that resists reflections and glare. Each eyepiece in the Omni Series includes a black rubber eyecup. It can be left up or folded down for better observations while wearing eyeglasses. Models with a longer barrel (15mm, 32mm, 40mm) include a rubberized grip for non-slip handling during observing sessions. The insert barrel is threaded to accept 1.25 filters.
Focal Length | 4mm (0.16") |
Apparent Field Of View | 50 |
Eye Relief | 6mm (0.24") |
Number Of Lens Elements | 4 |
Barrel Size | 32mm (1.25") |
Free Shipping | No |
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