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 210mm, 215mm, 8 1/4″ and 8 1/2″ 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