Pentax tonight aggressively tackled the starter DSLR field with an overhaul for its least expensive K series camera. Now using the Japanese naming scheme, the K-x becomes the least expensive DSLR ever to shoot video and records 720p at 24 frames per second. Compared to the K2000 it replaces, it also gets a much improved 12-megapixel CMOS sensor (up from a 10-megapixel CCD) that takes in more light and has a dramatically larger ISO range that normally sits between 200 and 6,400 but can extend to 100 and 12,800 with an override.
