Quote:
Originally Posted by Ooztuncer 
exactly what I am thinking.
I decided to get a rebel xt body rather than the 1D, 10D, 20D, pentax k100d, evolt e-410, or nikon d40.
Now, next phase - a sharp walk around lens (somewhere from 15-25mm to 90-145mm) with good AF capability on low light for around $300. Any luck?
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The 17-85 is closest to the focal length you want, but it's not a low light lens, sharpness is OK stopped down, and it's way more than $300. (around $490 or so). The 17-55/2.8 EF-S is much sharper, a lot faster, but even more $$$.
Basically, the only thing you're going to find that's fast and cheap will be a prime. Zooms in this price range will be slow (f/3.5 - 5.6 or so), and hence useless in low light. They all have sliding apertures, which means it might be fast on the wide end, but slower on the long end.
Actually, you can hardly even get a good prime for $300. The 50/1.8 is ok stopped down, and it's cheap (around $70). It's an ok lens, but nothing special.
Your best bet will probably be to check out the third party lenses, like Sigma, Tamron or Tokina. The Sigma 17-70 /2.8-4.5 is around $360, and it's close to your budget and focal length needs. The sliding aperture is the killer, though. No idea on the sharpness, tho.