http://pentax.photoble.net/?exif=101123001
http://pentax.photoble.net/?exif=101122033
http://pentax.photoble.net/?exif=101122032
http://pentax.photoble.net/?exif=101122031
All were taken with a K-5 with firmware 1.01 and RAW converted via Pentax DCU 4.31.via a DPR post here.
But do note that the photo below is NOT made with the DA 18-135, it is made with an A 50/1.7 and the picture has been edited. I believe the poster is simply mistaken there:-
http://pentax.photoble.net/?exif=101122025
Anyway, we see the difference. That's always what I say: Prime is Prime, and Zoom is Zoom! That is, not matter how "good" a zoom is, it is Just a Zoooom!