Takahashi Mewlon 180C Dall-Kirkham optical tube. Diameter 180 mm and focal length 2160 mm (F/12). New high reflectivity coating and internal baffles in the primary mirror dewshield for best contrast at the eyepiece. 6x30 finder and Vixen/GP dovetail included into price. OTA is very compact and light, 6.2 Kg only!