A couple more fitting /adaptor queries - Thanks. Lens 4 - Optomax 2.8 135mm Prime (Not sure about using this one as it has some fungus and on the inside between the lenses the black coating is pitted and worn away with a lot of silver showing through so any thoughts / advice on that would be appreciated as well) Lens 5 - Tamron Adaptall Random Bits - Came as part of the purchase. What are they? Any use? Any value?