Wow... guess I'm not the only one who was not entirely impressed with the DA* 16-50.
As I mentioned before, though, I REALLY want to justify buying this lens because most of the Pentax stuff I bought has been stellar in quality, and I've always wanted to get a really really nice replacement for my kit lens (18-55) or even put all my main primes into one DA* zoom lens.
Here are two images of the same subject, but using my Pentax SMC-M 50mm prime and the 50mm tele end of the DA* 16-50 (both at F2.8). Note that this was not a very detailed comparison. I merely just took two shots of the same thing to see if the images would compare. I even accidentally left a skylight filter on the SMC-M 50mm prime! Oops. Note that the images below are crops of the original image.
When I took a shot with the DA* 16-50, and saw how blurry it was, I thought that maybe it was my camera causing the problem. But then I take a picture with the Pentax SMC-M 50 and got results that were actually quite a bit better! See below:
Pentax SMC-M 50MM Pentax DA* 16-50
I would love to see people post pics of the DA* 16-50 doing its thing (help me justify buying this lens!). But right now, after two copies giving 'decent' (but not spectacular) images, I'm going to have to stick to my primes.