Originally posted by Just1MoreDave I did test the kit lens (version 1) along with a bunch of 28mm lenses a couple of years ago, including copies your two 28s. By f8, the test results were about the same. In the real world, f5.6 would be close, probably fine on version 2.
There is undoubtedly some sample variation, differences in how people go about testing, and differences in what they are looking for. But FWIW, I did a similar test using two different 28's (the M28/2.8 and a no-name) against both versions of the kit lens. I found the no-name 28 was no improvement over either kit lens in any way aside from being a stop faster. The M28/2.8 was sharper than the version I kit lens at all apertures up to f/11 (which is as far as I tested), and was sharper that version II at all apertures up to f/6.7 or so. By f/8, there was very little difference, in the center, but the M28/2.8 still won in the corners, if only slightly. The two kit lenses, BTW, were pretty similar up to f/5.6 or so, but the version II got much more noticeably better by f/8.
Still, we're talking about pixel peeping differences. I can use those tests to rationalize why I prefer using the M28/2.8, but again, really, it's mainly because I like primes because they are smaller, faster, and this one at least has a nicer MF ring.
Quote: I've never compared at 50mm
I did. It wasn't pretty. Differences between my 50/1.7 and either kit lens at 50mm and f/5.6 were *obvious* in favor of the 50. In fact, the 50 was noticeably sharper at f/2.8 in the focus plane than the kit lens at f/8. My 50-200 - now that actually gave the 50/1.7 a run for its money. Not bad at f/4, and by f/5.6 way better than the 18-55 and respectably close to the 50/1.7.
Quote: There also aren't a lot of old inexpensive primes below 28mm, where the kit is a good iexpensive solution and a bit faster.
Quite a few of us think of our kit lenses as DA18/3.5's.