Focus cam will fit on 4×5 Linhof Technika III. The leading edge will need to be filed down to calibrate a specific lens. Follow this tutorial to calibrate the cam. This cam is available marked for 240mm, 250mm and 10″ to match the markings on your lens.
Only available in Aluminum.
On demand printing and delivery of this item is provided by Shapeways.
Calibrating Technika Cams, part 1
Calibrating Technika Cams, part 2