Dpreview added the new Pentax K-3 Mark III camera to their studio test scene:
Worth mentioning at this stage, however, is the slight (relative) softness of the K-3 Mark III at its ISO 100 and 200 settings in our daylight mode in particular. Despite repeated attempts using Live View, the optical viewfinder, mirror lock-up, shake reduction (which isn’t recommended for tripod shooting) and of course a self-timer, we were unable to produce a sharp image using the mechanical shutter at these particular settings due to shutter shock. (Dpreview)
Photographic Central also published their third part of the Pentax K3 Mk III camera review.
Check Pentax K-3 Mark III camera availability at: