Thanks for all the advice. I've decided to stick within my more realistic budget and go for the Sigma 18-200mm - thanks for the sample pictures Hardgravity, they really helped me to make up my mind!!

How much would you want for the lens? Send me a PM if you're interested in doing a deal!!!

I'm really wanting an all in one lens so I don't have to keep changing out in the field, so to speak. I'll have a look for the Pentax/Tamron 18-250 and see if I can find one anywhere!!

I'm looking to upgrade my kit lens for my K-X and I'm torn between the Sigma 18-200mm on Amazon at £185 or the Sigma 18-250mm for £399. I was wondering if anyone could give me advice as to which is the better lens - I'm pretty new to DSLRs and could use as much as advice as I can get!!!

I'm also looking for one of these lenses if anyone has one around the same price!

Thanks for all the advice - you've all given me a lot of food for thought here!

I've recently bought my first DSLR, the K-X, and whilst I'm happy with the kit lens for now, I am thinking about upgrading. I was wondering if anyone could give me any advice about what sort of lenses I should be looking for. At the moment I do mostly landscape and macro photography.
Thanks,
Martine

Hi everyone, I just thought I'd introduce myself. I'm very new to DSLR photography, given that I've only just bought myself a K-X, but I've been messing around with digital photography for about ten years.

I'm 28 and currently studying with the Open University for a humanities degree, in between doing freelance writing (I can hardly count it as a job when I love it so much, lol!). I live in York, so my main photographic haunts are in North Yorkshire.

I'd really appreciate any advice that anyone can give me!
Best wishes,
Martine