That's nice to know. Not certain how this canon lens would differ from or show advantage to my 90mm tele elmarit 2.8. The 135 is clearly a winner. I like the ability to mingle reasonably close in the crowd, but take pictures without intruding to closely. Leicas may be quiet (not really to current standards of silent shutters) and sort of small, but they are not incognito by a longshot.