Ben Z
Veteran
All my lenses needed re-collimation to higher specs for use on digital Ms.
Ouch! I guess I have to consider myself extremely fortunate. Except the one I had DAG fix, not only are all my Leica lenses right-on (including a 1961 135 Elmar!), so are all my screw-mount Leitz and Voitlander lenses (incl. a 135 Hektor). I think my 50 Summilux is front focusing but by such a tiny amount I can't repeat it consistently without a tripod and a macro-focusing rail, and that's not the way I'd ever use that lens in practice.