Originally posted by Erik I don't think anyone's arguing against that, but some people need more resolution than an *ist DS can deliver, or more resolution than some lenses can deliver. The fact is that the 16 MP sensor on the K-5 will easily outresolve certain older (and newer) lenses.
Mm, there's also that Oh YES! that happens with a piece of glass, isn't there? Some lenses you have to test out the wazoo before deciding if it's to your standards, but sometimes you get one where you pop out the first test shots and all of a sudden, Oh YES! and then decades from now they have to surgically remove it from your clutches before they can fit you into that burial tux, and whoever inherits it will have to keep going back to your headstone to dig the thing up when they want to use it.