The CL can take nearly all the Leica M lenses. Exception are some lenses that protrude deep into the body and could hurt the meter arm, these include: 15mm/8 Hologon, 21mm/4 Super Angulon, 28mm/2.8 Elmarits before serial number 2314921. The eyed lenses, including the M3 wide-angle lenses, the 135mm/2.8 Elmarit, and the 50mm/2 Dual Range Summicron, cannot be mounted either because they are incompatible with the body shape. The 90mm/2 Summicron and 135mm/4 Tele-Elmar are incompatible too. The collapsible lenses can be mounted but they must not be fully collapsed, and Leitz advised to stick to the barrel an adhesive strip of adequate width, to limit the collapsing movement. Another limitation is that the rangefinder is only coupled until 0.8m.