In reversing time order..4. 2012: Pentax Ricoh Imaging Company:-A Ricoh K-5:-Source: A DPR Forum Post3.5. 2011-12: Transitional Period from Hoya to PRIC:-Label and documentation are showing Hoya but there is a notice of change of ownership included in the box.Source: Changing the Focusing Screen of K-5 - Tips and Techniques3. 2007-2011: Hoya Corporation:-A Hoya K-5's bottom:-K-5 is a Pentax DSLR
