Orion 9959 254mm f/4.7 Reflector Telescope Optical Tube Assembly 254mm (10") aperture and 1200mm focal length reflector telescope optical tube provides vivid, close views of deep-sky and solar system objects Includes 2" Crayford focuser for smooth, backlash-free focus adjustment Recommended for visual or astrophotographic use Weighs 27.2 pounds Optical tube only, does not include tube rings, mount, or tripod - which can be purchased separately