<p class="first"]Hello everyone,


I've got a Canon 450D with a 18-55 lens...


I think I can get higher quality pics with a better lens and also sometimes I need higher focal length.


I have been reading many reviews on the internet about these lenses (17-85 &amp; 18-135)... I think I want a versatile walking around lens, but still don't know which one.


There are of course other brands like sigma that I don't know anything about them.
<p class="last"]I was wondering if somebody can shed a light on me...

<p class="last"]
<p class="last"]Thanks