>The 135/f2 is quite a bit quicker in AF than the 180/f2.8. I >have them both and there's really no comparison.
That's good news. I am more and more convinced that this lens will be a good addition to my set. Even if the rumored 135 F/1.8 AF-S were to appear on the scene it more than likely will not have the metal "feel" this one has. I must admit that its build is one of the things I find so attractive about the 135 DC. The 180/2.8 and the Angenieux 28-70/2.6 both seem to have firmware issues with cameras produced after the D200 (the d700 seems to not like either one at all). That is why I don't use either one as much as I used to. And that firmware compatibility issue was an underlying concern which was one of the reasons which prompted me to write here about the 135. I appreciate that modern TC's won't work with the 135 but having thought about it that is really not an issue. I'd rather use a 300/F4 prime rather than a propped up 135 that would also be F/4 very likely without AF. I interpret the 135 to be used as it is in certain circumstances and under specific low light conditions. From what I have read the Defocus Control can be ignored unless you know how to use it.