Originally Posted by Rune
Good points! However, what makes me a bit frustrated is the pixel-peeping crowd obsessing over sharpness, when what I am looking for is lens/sensor signature (as in the "Sonnar look"). That is what I really like about this forum - I get valuable input (like the one quoted above), without the pixel race hysteria
I think an often forgotten point in all of this is print size. All of the talk about performance hinges on the concept of printing to a particular size. I tend not to print larger than 13x19, for the most part, so that is my frame of reference in determining whether a lens is good enough or not for me.
If you don't print at all, then just about any lens will likely be good enough, technically.
Another thing to keep in mind is that the lens look and signature changes when you switch between formats. You may very well like the look of the ZM 25/2.8 on an aps-c sensor, but you may not like the look on a smaller or larger sensor, which is why I still contend that matching sensor to lens is may be more important than sticking to one lens and using it on different formats and sensor types.