Celestron 15mm Omni Plossl Telescope Eyepiece is a classic example of a 4-lens symmetrical Plossl 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.  

Celestron Product Number: 93320

• Offers a Quality 4-element Plossl Optical Design.
• Rubber Eyecups Provide Comfort and Increase Contrast.
• Matte Aluminum Barrels and Blackened Lens Edges Prevent Internal Reflections.
• 1.25" Barrels are Threaded to Accept Filters.