Hi everyone,

i have a 50d with a Tamron 18-270 lens. It isnt a bad lens and suits me pretty well given i travel a lot and dont want to cart a huge kit about.

Anyway after a fair bit of investigative work i have found the 18-270 moves from forward focus to back focus through the zoom range, and hence a fair few dud pictures. I'm going to send it back for a warranty job but this will take 3-6 weeks, too long given i only have the one lens.

So i 'need' another lens which is my conundrum. Most of my photography is outside, so light is generally ok, but varies from landscapes etc to children, pets etc.

I did think to begin with a 50mm would be a decent move, maybe the 50mm f1.4 @ $400-500 (grey import). But now dont know if maybe the 24-105mm f4 @ $1,100ish may be a bit wiser and be more versitile. (or do I just have a case of L series lens envy). May i also add $$ isnt a huge issue, but as my wife says i am as tight as a fishes posterior.

Does anyone have any thoughts on what i do?

Cheers,
Steve