From: Doug McLaren on
I've got a Rebel T1i and XTi. Both currently have the stock/kit
(well, for the Rebel T1i) 18-55 image stabilization lens. For the
record, I'm not a very good photographer and certainly don't know all
the features on my camera, and most of my pictures are taken in CA or
Full Auto mode. Many are taken from a moving bicycle, but the problem
I'm referring to isn't specific to that.

Previously I had the 18-55 non-IS lens on the XTI and was quite happy
with it, but I gave it away and "upgraded" to the IS lens on it.

Was that a bad idea?

With the IS lens, I seem to get a lot of shots that aren't clear,
especially when the light begins to go down, but not enough that it's
time for the flash. I don't recall this being such an issue with the
non-IS lens on the XTI. The shots are like they're out of focus, but
it's more like things moved during the shot, even if they didn't.

It happens on both the XTI and T1i now, both having the kit 18-55 IS
lens.

Turning off the IS seems to reduce the effect, maybe.

Taking pictures in bright sunlight or with a good flash greatly
reduces the effect (probably because the shutter time is short (in the
sun) or doesn't matter much (with the flash.)

Is it this lens? Or am I simply losing my mind?

Should I try to find two 18-55 non-IS lenses? (Should be pretty easy
on Craigslist. I could get other lenses, but the 18-55 ones are
pretty easily found and cheap.) The IS does seem to help in some
cases, but really, it seems to ruin more pictures than it helps, even
if I turn it off.

--
Doug McLaren, dougmc(a)frenzied.us