Okay, I guess quite a few guys here already got the camera. Some already shared their feeling and praise about this camera. Here as usual, I'd share some of my first thoughts.
Since the camera is almost the same as K7 on the outside, I won't say too much about whatever K7 already has. Here I'm only listing the obvious or major differences between K5 and K7.
1. Well, I thought I'd be able to use the camera straight away w/o any problem, but actually I did have some problem w/ some settings. K5 has quite a bit more settings (menu items) than K7. I especially like the setting that the camera can remember the last menu page now (can be enabled/disabled). When you press the menu button again, the last viewed menu page will show up instead of the very first page. What a cool addition!
2. AF is definitely faster and snappier, I only used DA35 lens, the AF never even hunted once even under very low light condition.
3. Haven't got chance to test low ISO yet, but high ISO is definitely A LOT better than K-7, easily as good if not better than K-r, but K5 photos have 4million more pixels.
4. There are 5 User settings to keep rather than only one like on K7, not really a big deal, but some might find it useful
5. RAW (FX)button now can be defined as some other quick accesses too.
6. Long exposure NR (noise reduction) can be turned OFF (thank you Pentax!)
7. 7fps continuous shoot is really fast!
8. AF (contrast AF) under liveview is much faster too!
9. Cross Process would be very fun, I'm sure I'd use this one a lot
10. 14bit RAW vs 12bit on K7.
There are sure quite a bit more differences/improvement which I forgot to list here. But I guess all these would make upgrading to K5 a no brainer
I also got the DA35/2.4 lens too. It's a beautiful lens, seems to be very well made, other than its light weight. Optically it's very very good. I'd do more test against FA35 and A35/2 over the weekend.
This time I didn't take open box photos, just two quick snaps before midnight: