The adapter should protect (as in my previous camera with there associated adapter) that once as stablie envelope and exiting lens against external dangers. Protect the works also, but below a certain focal length the interior of the adapter is mitfotografiert. If only telephoto shots are taken, the adapter is suitable for protection. But at normal or wide-angle shots, it would always be unscrewed. The adapter itself is solid, looks good technically and the thread moves smoothly. The adapter does not dissolve by itself.
