There’s now a growing database of Leica’s lens codes for use on the M8. Why pay $120 and wait 6–8 weeks to have Leica code your lenses when you can do it yourself with a marker?
Check out this how-to by Mike Prevette on the Leica user…

As I posted previously [1, 2], Leica have a coding scheme for their lenses so that the new digital M8 body can automatically identify the mounted lens. It turns out that you can use a marker to code the lenses rather than paying Leica US $120 per lens…

As I posted previously, Leica have a new digital coding system for their M lenses so their digital bodies can automatically detect which lens is mounted. The coding consists of six painted dots on the mount, and normally costs a characteristically exto…