http://www.monox.jp/digitalcamera-sp-pentaxricoh-k50.html
(in Japanese)
The above is the index page, click on the links to see different test pages. In particular:
1. This is the ISO test for the K-50:
http://www.monox.jp/digitalcamera-sp-pentaxricoh-k50-04.html
The NR setting from left to right is weak, medium and strong, respectively.
2. These are the lens tests for the new DAL WR kit zooms:
http://www.monox.jp/digitalcamera-sp-pentaxricoh-da1855alwr.html
http://www.monox.jp/digitalcamera-sp-pentaxricoh-da50200edwr.html
Distortion, both uncorrected and corrected, and resolution at different apertures were measured.
On the other hand, the other lens tests for the DA18-135, DA50 and DA40XS were made with other Pentax bodies namely the K-30 and the K-01.