Since No description came with I describe briefly the installation of the filter adapter with the additional filters to the LX-7: The foremost groove-free ring on the lens-barrel of LX-7 can be opened by turning it to the right (counterclockwise). There is behind really a thread, although not at first suspected this. The lens set can now be assembled and can remain there while the camera is turned off. Please do not use force. Try it several times if necessary with feeling. Depending on the delivery condition of the camera, the ring goes from very difficult. Use them in any case, a pair of pliers. It must go with her fingers. A detailed description can be found in their digital manual of LX-7 on page 203rd mfg MS
