Hi all ... generally speaking I am content with a couple of normal range zooms plus a couple of primes (Pentax). However, I do a lot of travelling and something like an 18-200 would be very useful for those occasions. Does anyone have any experience with them? I appreciate that they won't compete with primes, but so long as the quality is "very good", then I would be content. Tamron certainly make one in Pentax fitting.

Thanks
Mike