Pentax K-5 brings 16.2MP sensor, 'much faster' AF, and enhanced HDR to midrange DSLR party Photokina is just about getting started over in Germany today, and Pentax has grabbed the opportunity to unveil its next K-series shooter nice and early. The new K-5 looks exactly as a leak earlier this month suggested, meaning it's an almost identical brother to the weather-resistant K-7. Of course, the big