<p><strong>Features:</strong></p> <ul> <li>Completely manual control, manual focus and manual exposure.</li> <li>Allow Focusing to infinity.</li> <li>Made of Aluminium and brass.</li> <li>Auto Focus is not available.</li> <li>Suppor AV or M mode.</li> <li>Lens lock / release and stop screw.</li> <li>There is no ROM connection on the ring so diaphragm control of the lens is set manually.</li> </ul> <p><strong>Suitable for:</strong></p> <p>Pentax K lens<br />MFT camera - Olympus or Panasonic.</p>