On Feb 23rd Tokina employee confirms pentaxforums.com that Pentax is reportedly developing a full-frame camera and the according to the Tokina employee a prototype already exists and under testing.
Now photographer Mike Svitek posted this on hig g+ account:
“Testing out the new Pentax K-# HDSLR [ icon wink Pentax K 3 24MP full frame camera announcement on March 27th? WINK WINK… NUDGE NUDGE ] with the Pentax 77mm Limited Prime lens … 1/500s f/11 ISO25600 Custom WB
I love the tones, the dynamic range is amazing, and the resolution (while being too high for my taste) has its advantages when clearing up some noise. With the combo of the new sensor and processor, there is very little noise to clean up in the first place. It only starts showing up visibly at around ISO6400 (becoming obvious here at 25,600 and pretty bad at the extended range of 102,400) … As I already stated, this camera sits between its competitors with the D800 and the D4 or the 5D Mrk.3 and the 1DX
According to PhotoRumors Pentax may announce its Full-Frame camera on March 27, 2013, and Japanese Magazine Nippon predicated that K-3 will arrive on April 2013 – Stay with us and we will update you soon as we get any new info.