Celestron EdgeHD TM 800 CG5 Optical Tube 40mm 1.25" Eyepiece - 9x50mm Finderscope - 1.25" 90-Degree Mirror Diagonal - Dovetail Rail for CG-5 Mount - 2-Year Warranty 8" EdgeHD Optical Tube Assembly Aluminum Optical Tube Celestron's premium StarBright XLT coatings 2032 mm focal length (f/10)