The refractor telescope uses a lens to gather and focus light. Comes with right angle eyepiece adapter, finder scope (5x 24″), sunshade, aluminum tripod, lunar and sun filters and accessory tray. Lens diameter: 60mm, 2″. Focal length: 900mm. Eyepieces: 10mm, 25mm, 2x Barlow lens. Maximum Magnification: 140x (10mm eyepiece with 2x Barlow lens). 2 Year Warranty.