TorcDobIII

This is my ATM light machine, sporting a 222mm f/7.3 mirror from Norman at Oldham Optical and a spring counterbalance system it gives me great pleasure to look at the sky. There's no wind area so its pretty stable in use, and the truss arm (now arms) is kept in place with a quick release mechanism for easy transport in the car. For the bearings they are etched PTFE onto aluminium or PTFE gliders onto smoothed wood.