I have a Olympus OM 180mm f/2. I wouldn't use any other MF lens of this speed & focal length simply because its the only one that's less than 2kg.
The most effective way to shoot such lenses is in burst mode to assure at least a couple in focus shots. I got the Olympus for a price that I'll likely never see again. I sometimes debate whether selling it for a profit and getting an AF version would be the smart move.
