Celestron Ultima Edge 15 mm Flat Field 1.25" Eyepiece - 93451 Sky-Watcher the compression ring provides a

the compression ring provides a more secure locking method via distributed surface contact

Focal Length (mm): 1200 mm (47 in)

ED102 Carbon Fiber f/7 Air Spaced Triplet with HOYA FCD100 optics

It is also capable of fitting several other scope sizes

5mm Eye Relief 11mm IPD Max 72mm IPD Min 58mm Optical Coatings Multi-Coated Weight (oz) 11oz (312 g) Prism Glass (Type) BK7 Relative Brightness 6

Celestron Ultima Edge 15 mm Flat Field 1.25" Eyepiece - 93451 Sky-Watcher the compression ring provides aCelestron Ultima Edge 15 mm Flat Field 1. 25" Eyepiece 15 mm Parfocal Ultra Flat Field eyepiece designed for 1. 25 focusers Celestron Ultima Edge Series optical design Incredibly crisp views from center to edge of field Fully multi coated, 8 element lens design for excellent light transmission Wide 65 Apparent Field of View (AFOV) Generous 16 mm eye relief for comfort Fold down Rubber Eyeguard for comfortable viewing with or without eyeglasses Molded