With CP+ 2016 in full swing, we stopped by a very crowded Ricoh booth to get our hands on the hotly anticipated Pentax K-1 full-frame DSLR. During our visit, we couldn't help but notice something very special hiding in the back - the original Pentax full-frame DSLR prototype from Photokina 2000. Take a look, as we take a peek at Pentax full-frame - both past and present.