This is the Carl Zeiss PC-Distagon 35/2.8.
One of the best lenses for architecture pictures.
First, we have to remove the four bayonet screws with our Phillips screwdriver.
And just lift the original bayonet, here you can see the four flat springs for the rotating mechanism.
They are dry already, so let's put a bit of our special grease at the working points.
So we can put our precisely machined and polished ring, that will work together with the springs..
Ring in place.
Now the Leitax bayonet, as you can see, it is a variation from our Sony-Contax bayonet.
So we can attach all together using the original screws.
Checking that nothing interferes with the mechanism even at the maximum displacement.
Here is our perspective correction lens on a Sony camera at the normal position.
And here rotated and displaced.
Nothing interferes.