Please don't hesitate to ask me any doubt regarding this conversion.

This is the Olympus OM-System Zuiko 300/4.5

It has three screws at the bayonet base, which we have to remove.

Just lift the bayonet.

Now cut a form like this from a piece of elastic plastic, I use PVC.

This way the plastic holds the aperture lever.

Another view.

I recommend to paint in flat black those bright screw heads.

I've painted the exposed side of the plastic too.

And we can install the Leitax bayonet .
This excellent lens is ready to shot on all  Nikon mount or Pentax cameras.
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