<ul> <li>Front side - 16-SP lens mount (compatible with Krasnogorsk-2/Krasnogorsk-3 bayonet lenses)</li> <li>Rear side - Arri PL camera mount</li> </ul> <p>Machined of high quality aluminium alloy.</p> <p>Infinity focus preserved. Can be installed on any camera with Arri PL mount.</p> <p>Please refer to the last picture showing how to distinguish 16-SP lens.</p> <p><strong>Important note:</strong> Krasnogorsk-2 lenses are very similar, but lugs width is 4mm instead of 10mm. 12mm and 25mm lenses with such K-2 mount will NOT work on this adapter since their focus ring does not allow them to be installed into this adapter properly. You can install them with some space between the focus ring and adapter, but the lens will focus to close distances only. Infinity focus will be impossible.</p> <p>50mm lens in K-2 mount will fit this adapter since it has small rear diameter and can be seated properly.</p>