Aperture: 50mm(2). Focal Length: 600mm. Focal Ratio: f/12. Rack-and-Pinion Focuser;Altazimuth mount makes pointing the telescope easy;Low (20mm), medium (12mm), high (4mm) magnification eyepieces give you variety for any viewing situation & 2x barlow lens doubles the magnifying power of each eyepiece;5x24 optical viewfinder helps you point your scope at objects you want to observe & accessory tray stores accessories while observing;Includes Astronomical Software and Instructional DVD