Originally posted by Riverlady I will probably get the 18-135 WR lens with this as I do not already have an WR lens. I have a variety of lenses, none of them especially fast. My go-to on the K200D has been the Tamron 18-250 which I absolutely love for the range, if not the speed and softness at the long end. I am often out where it is sandy/dusty and windy and it doesn't seem advisable to change lenses.. and I don't like to carry a lot of gear. I have reservations about the 18-135 because I love love love long tele shots but I"m afraid if went to a lens that lets me get to 250-300 then I'd miss the wide end.
Are you planning on keeping your K200D? If so, you might consider keeping your 18-250 mounted on one, and the 18-135 mounted on the other. That way you'd have the range from 18-250 without having to switch lenses in the field. Of course, this doesn't really jibe with your not liking to carry much gear.
EDIT:
Also, your post implies you do landscapes. I wouldn't think autofocus would be as crucial, considering landscapes don't really move much.