I have just bought another Leitz table tripod. It has a type D ball head. My older version has a type B ball head. On my older one to change from a ⅜" thread to a ¼" thread, you just unscrew the top knurled sleeve and reverse the disc underneath, which has a ⅜" male thread in the middle of the disc on one side and a ¼" male thread in the middle of the disc on the other side, then screw the knurled sleeve back on, which firmly locks the disc in place. The disc has a notch in the side, which locates on a lug to prevent it turning.
For reasons best known to them, Leitz has changed this simple and effective method to something else. On the picture below, the sleeve marked Part A screws onto the main shaft of Part B just above the cross bar. A ¼" threaded spigot then passes through a loose ⅜" threaded adaptor, Part C, inside the main sleeve, Part A (you can see it poking out of the bottom of Part A). The adapter is prevented from turning within Part A by means of a steel key. I feel that the ⅜" adapter should be able to be turned when pushed down into the body of part A, so that just the ¼" threaded spigot appears above the platform on which the camera sits.
Has anyone any experience of these Type D ball heads and am I trying to make it do something it cannot do. I feel given that they have made both a ¼" and ⅜" threaded parts, it must be designed to be alterable.
Wilson (puzzled )
Edited by wlaidlaw, 13 September 2017 - 15:17.