Celestron 21062 AstroMaster 70 EQ Refractor Telescope Aperture: 70mm; focal length: 900mm; focal ratio: 13 Focal length of eyepiece 1/2: 20mm/10mm; magnification of eyepiece 1/2: 45x/90x Finder scope: built-on star pointer; Star diagonal: erect image diagonal - 1.25 inch Mount type: cg-2 equatorial; limiting stellar magnitude: 11.7 Highest/lowest useful magnification: 165x/10x; light gathering power: 100x