Upload & Sell: Off
I'd like to hear more about your thoughts on this because I'm also considering buying one of these lenses.
Sorry I didn't see this:
More on the 90 CV, or the other lenses?
My main gripe with the 90CV was that I didn't like the bokeh in certain situations, and I also really found the rendering uninteresting and abrupt for the way I was shooting it. Mind you mostly on an M8 and only a bit on the M9.
My very quick take on the other lenses are:
75 APO - seems to lack contrast significantly, gives you a soft rendering, with really sharp focus point. Bokeh is pretty nice throughout, but you really need to be prepared to work on the contrast/curves in LR if you want an images that doesn't feel flat and washed out. I've read about this, and I might just need to have my lens serviced, but in all fairness I just did get it back from Germany, and nothing has changed with it..
75 Summarit - Has better overall contrast, but seems to be a bit muddy in the colors at times. Can often give a really neat look, but portraits can suffer a bit from the slightly muddy colors (nothing near as bad as canon/nikon though). Bokeh can be a slight bit more sketchy, but I actually quite like it, its unusually pleasing, even though I shouldn't be a fan based on what I usually like to see in my images.
90 APO - I found this lens to be fantastic, no complaints other then it was hard to nail focus, I don't know why, it just is.. Also found it to be a bit flat at times, but nothing you couldn't fix in LR, not nearly as bad as the 75APO.
90 Summarit - Thus far, find it much easier to focus then the 90APO, but it suffers from being a slight bit more muddy, not a lot of contrast (almost like the 75APO in that sense, but seems slightly more artificial/sketchy when you try to enhance it in LR).
Again these are just my quick thoughts and I haven't done a direct comparison yet.. And now anyway my opinion is quickly becoming less valid, as I find myself comparing all my lenses to my 50APO, which is on the camera 100% of the time.. I'm not kidding about the 100%, I picked up a second M240 just so I would use my other lenses.