Celestron 12mm X-Cel LX Series 1.25" Eyepiece

Focal Length 12mm Apparent Field of View 60 Degree Eye Relief 16.0 mm Eyepiece Barrel Diameter 1.25" Field Stop Diameter Not Specified by Manufacturer Dimensions 1.9 x L: 3.1" /4.8 x L: 8 cm Weight 6.6 oz / 187 g Box Dimensions (LxWxH) 5.05 x 2.45 x 2.3"