So i just received my M42-M43 adapter (generic ebay adapter) and i wanted to test my newly acquired Helios 44M-5 58mm f2 and Soligor 135mm f3,5. These are my first M42 mount lenses, and i like the mount, no hassle, simply screw in the lens until the end and that's it. Helios - apart from the fact that the lens has focus ring in front of aperture ring (takes a bit getting used to), it seems fine. Also, aperture has 11 points, (for f2-f16) so i guesss those are half stops. However, the lens has a pin in the mount that activates the aperture blades, and when i place the adapter, the pin is not pushed in (resulting in a constant wide open lens). Do i need another adapter or do i need to perform some sort of witchcraft (tape or sth similar) in order to have the pin pushed in at all times? Soligor works fine with the adapter (smooth aperture changing, no clicks). Can anyone help? Left is Helios, right is Soligor.