It didn't. I think some people consider M to mean "manual" as in manual focusing. Just a guess ....
Shel > [Original Message] > From: Don Sanderson <[EMAIL PROTECTED]> > Here's a prime example of that by Adorama, > who should know better: > > http://www.adorama.com/US%20%20%20%20146759.html > > AFAIK the 55/1.8 didn't come in an "M". > (This is a pretty good deal on the "K" > though, they seem to be getting pretty > hard to find.) > > Don