the 28-135 is EF glass. i know the 10-22 would be REALLY soft aronud the edges but it would stay on my 30/40D anyways. the only lenses that would go on the 5d would be the 70-200 and the 50.
2sic4u: my 30d is great but suffers in low light conditions. the low light performance is what im most after. also, itd be nice to have that video function. i havent been able to take video in a long time and i miss it.
this is the wide zoom i have, btw. tamron 10-24