KIPON Leica L-M Mount Adapter with 6-bit Code 28/90 This is a mount adapter for attaching Leica L (screw mount) lenses to Leica M-mount cameras or M-mount adapters. It is a rare type with a recess for writing 6-bit codes. It has already been painted, but you can change it by referring to the code chart and repainting with white or black ink (paint markers or other magic markers can also be used). 6-bit code chart reference: https://at-leica.com/6bit/ When attached to a Leica M-mount camera, the 28/90mm bright frame will be displayed in the viewfinder (limited to cameras that support the frame). Attachment and shooting tests have been performed with a Leica M digital camera. It has been used infrequently and has no noticeable damage.