The Galileo F-650 is our smallest telescope ideal for smaller younger astronomers. It s mounted on an Altitude Azimuth yoke mount. It s easy use up and down left and right movement is great for beginners and casual star gazers alike. It makes an excellent first refracting telescope for your kids or grand kids. Terrestrial viewing is extremely easy due to the included 90 diagonal mirror which produces a totally erect image. The Mount is attached to a very sturdy fully adjustable pre-assembled metal tripod with rubber feet. The Galileo F-650 optical tube assembly features a 600mm focal length. The objective lens is an 50mm two element achromat (color correct crown & flint) air spaced objective lens. The tube itself is aluminum painted flat black internally and fully baffled for excellent visual imaging. The finderscope is Galileo s Mars Eye electronic Finderscope which helps by getting the observer behind the telescope without losing the surrounding field of view when targeting objects. Included with the F-650 are a 6mm eyepiece and a 20mm eyepiece. 600mm x 50mm Optical Tube Assembly Diffraction limited Optical Tube Assembly ( 4) Altitude Azimuth Yoke Mount Fully Adjustable Pre-assembled Metal Tripod Galileo Mars Eye Electronic Finderscope .965 20mm Eyepiece .965 6mm Eyepiece Galileo Planetarium CD-ROM