This lens is the highly appreciated APO-Telyt 180mm.

Thanks to loan from a customer we tested the lens and wrote below instructions.
3 cams

It is a 3 cams lens.

First, remove the bayonet screws.

The bayonet can be removed just lifting it.

With the new Leitax mount model, you can reuse the black tube to avoid flares, take a look here.

Check the position of  the bearing ball, it our case it remained stuck to the bayonet.
descargolar cams

Now remove the two clear metal cams.
cams out

Cams removed.

Put some grease onto the hole with spring where the ball goes.
bring the ball

Now install the ball onto its place, it will remain there stuck with grease.
in place

The small ball on its proper place.
bayonet to the lens

Install the Leica-Pentax or the Leica-Nikon bayonet, the red dot in front the scale center.

The Leica-Nikon bayonet has the red dot slightly more to the right than the one at the picture.
screw bayonet

Screw the Leitax bayonet, a small turn after another, in cross pattern.

Now the APO-Telyt is ready for your Pentax or Nikon camera.

I would like to thank again our customer and friend Vincent for the temporal cession of this magnificent lens.
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