Originally posted by Marc Sabatella Lars, you posted that before, but now I'm wondering, is that a 100% crop? Because that's *much* worse than anything I've seen even from the kit lens (although as I recall, yours ithe version I).
Basically, the reasons to use a 28 instead of the kit lens (version II) are either:
- you need the extra stop or so of speed
- you need the extra sharpness you get up to about f/8, after which the differences are negligible
- you're just a prime kind of person
Marc, I have the 18-55 WR and basing from the shot comparisons that I made against it and the K28/3.5, FA35, and FA50/1.7, the resolution of the WR kitlens seems to suffer more with the 18-55 as you shoot longer at midrange to infinity, irregardless if you stop down or not. I did shoot at 3 varying stops from f4, f5.6 and f8 at 28mm, 35mm, and 50mm.
the 18-55 did very with up-close shots at those focal length against the 3 other lenses, although it appeared that the 3 lenses have quite some advantage in resolution. the advantage becomes more apparent as you move further away. stopping down doesn't improve it sharpness. and the image becomes more blurry. I also tried an image text test.
I also noticed such weakness when I compared the 18-55 against the 12-24 set at 18mm and 24mm with apertures f4 to f8 respectively when I did some architectural shots last year. even at f8, the 18-55 is no better.