Originally posted by baro-nite This is a really odd statement from someone who not infrequently cites photozone.de as a resource. Lab tests have their place in lens evaluation, and are especially useful for super-tele lenses where sharpness and control of aberrations are so important for the uses to which these lenses are typically put.
You just get to a point where, you have lenses like the 21, which is not all that great on the charts, and two other great lenses that cover it;s range, the 18-135 and the Tamron 17-50, both of them better on paper. Yet I find myself reaching for that lens in certain situations. There is more than sharpness to a lens. Once you've bought a bunch of sharp lenses, you find yourself reaching for them at appropriate situations not based on a couple hundred LW/PH, but on how they render.
So I love the test charts, but in the field, I don't select based on test charts or resolution. I select on which lens is most appropriate. IN terms of telephoto's you are absolutely correct. I've returned a number of telephotos because they did so poorly at long range... but never because of their performance at 8-10 feet. At that distance, as long as you're past minimum focus, almost every telephoto is good.
A 21 Ltd image, I propose, higher res, wouldn't be better.