Well, sorry to tell you I don't have any personal experience with all Sony lenses (I should try them all, expand my knowledge

). I have, however, read on several sites that the Sony 18-250 is a lot better than the 18-200. However, since it's a special deal you're looking at, that wouldn't be an option...
I think owning a superzoom lens like the 18-200mm is great, because in dusty or sandy conditions, were you don't want to be changing lenses too much, you can use the bigger range of the camera.
I looked up the lens on Dyxum, and got to
this page. There you'll find reviews from people who actually use or used the lens. Some negative comments:
- not quite so sharp, and too soft at 200mm
- barrel extends while camera is hanging down
- distortion at 18mm is pretty bad
- focussing isn't too fast
- turning focusring in AF-mode
- MF isn't smooth
- unsuitable for normal indoor shots because of the f/3.5-6.3
- very bad for astro-photography, the moon looks like a fuzzy ball
Some positive ones:
- great walk-around-lens
- some use it on their camera most of the time, because of the range
- at 200mm it's not too bad for macro
- quote: "It's way ahead of the kit 18-70"
- hardly any purple fringing
- good colour reproduction
- relatively lightweight
- build is plastic but not bad at all
You can see some
sample images here.
All in all, I think that if you're looking for a walkaround lens of this range, and you really don't want to be spending too much money, it would be an option. However, I myself would go for the 18-250, not only because of the even longer range, but also because the IQ is said to be better.
Hope I've given you some useful advice!
- Bjorn -
- good flare and CA control