Which wide angle lens?

[satans worm]

HI

I have a Canon EOS 3 with a 28-135mm IS lens and am looking to buy a wideangle lens of around 15-18mm.

On a budget (around GBP100-150) so secondhand is the way to go, are their any ones to miss (sigma or other independents?) or any that could be good in that price range, or should i up the funds?

Any reccomended 2nd hand shops would be appreciated also

Thanks

[poah]

should be able to get a sigma EX HSM 17-35 f2.8-4 for about £150 - I could be selling one if you're interested

[satans worm]

I would be interest in buying it actualy, email me if you do decide to sell

Thanks