2'' TUBE EXTENSION - 80mm pier The fans are controlled by

The fans are controlled by a switch on the optical tube

The surfaces of the filters are optically polished and fully multi-coated

Three safety set screws

Made entirely of 6061 T6 aluminium and produced using CNC machines

positioned below telescope rings

2'' TUBE EXTENSION - 80mm pier The fans are controlled byExtension tubes are used when the optical tube is too short and the focuser has not enough travel to reach the focus. This accessory increase the optical path of your telescope of 80mm. The tube include two thumb screws to secure the camera or the accessory used. The internal compression ring avoid any scratch on your accessory. The bottom part is threaded (M48x0. 75) to allow the connection of standard 2" filters. The safety groove stop the extension