Celestron Omni series eyepieces allow you to dial in the right magnification for clear and sharp images of astral bodies. The 52 degree apparent field of view in this eyepiece is perfect for viewing the Moon, planets and deep-sky objects. To help with image quality, Celestron has used a premium 4-element optical set that is finished with multiple layers of high-transmission coatings. For better contrast during viewing, the edges of the optics have been blackened. The exterior of the eyepiece is almost as beautiful as the night sky itself. The aluminum body has gone through a 2-step anodizing process for a smooth matte finish that resists reflections and glare. Aluminum Body with 2-Step Anodizing for a Matte Finish Focal Length - 15mm (0.59") 4-Element Plossl Optics Apparent Field of View - 52 Degrees Barrel Size (in.) - 1.25" (32mm) Eye Relief (mm) - 13mm (0.51") Non-Slip Rubber Grip Blackened Lens Edges - for increased contrast Black Rubber Eyecups - they can fold down to accommodate eyeglass wearers Threaded Barrel for 1.25" Filters 2-Year Manufacturers Warranty

Focal Length 15mm Apparent Field of View 50 Degree Eye Relief 13.0 mm Eyepiece Barrel Diameter 1.25" Field Stop Diameter Not Specified by Manufacturer Dimensions Not Specified by Manufacturer Weight Not Specified by Manufacturer Package Weight 0.1 lb Box Dimensions (LxWxH) 3 x 1.7 x 1.7"