I have not used my Pentax ist DL camera for about a 1.5 years now. I stopped doing racing pics and nature pics for that time due to health issues. That has been overcome and I want to get back to nature photography again. I liked shooting in raw mode for obvious reasons and I used Infraview software to process the .PEF files and convert the final result to .JPG , however in the last year I upgraded the Infraview software and no longer can get the software to recognize a .PEF file any more !@#!!! Apparently it seems the upgrade does not automatically include the plug-in for .PEF and it is not easy to contact infraview people on their website, I am finding. Has anyone had this problem and how did you resolve it if you did.