Thank you drawoh.
I will make something up to get me underway.
I understand it to be somewhat odd but the optical plumb to the datum is viewed through the connecting screw.
Things are laser guided on the new equipment. However,as a newcomer to a very old subject I would like to understand fully...
Hello I am very interested in getting to know a Topcon TL20DF theodolite in order to change my Trade as a bricklayer into a setting out engineer.can anyone help me fit the instrument to the tripod it has a 33mm female thread,As always shops only want to sell you something brand new and space...