Profile: Orion Optics UK specializes in providing astronomical telescopes and hand finished optics. The CT range of telescopes features sandwich construction carbon fiber tube with a gloss external surface, and matt black internal tube surface. It provides zero expansion for focal plane maintenance. The rear mirror support is our 9 point flotation CNC machined mirror cell. This maintains positional accuracy. Also at the rear, our fan cooling system will minimize cool down times, and help maintain image quality during viewing. Fan(s) can be left in continuous operation. It is also available as an optional extra are baseplate attachments, and a choice of dovetails. A variable speed electronic drive can also be added to the OC1 focuser for precision focusing.