Based on the Pentax K-m, the latest K-x has inherited a number of features from the K-7 to entice the entry-level photographer. We put it to the test.
While the K-x looks remarkably similar to the Pentax K-m, a number of changes have taken place inside the newer model. The first, and possibly most important, is that the sensor has been upgraded from a 10.2-million-pixel CCD sensor to a 12.7 million-pixel CMOS sensor. This small increase in resolution keeps it ahead of the resolution of the Nikon D3000, Canon EOS 1000D and Olympus E-450, which all feature ten-million-pixel sensors.
The switch to a CMOS sensor from CCD is presumably to allow HD video capture and Live View technology on the K-x. Another improvement that will have an impact on photographers is the new AF system. Instead of the rather basic five-point AF system, the K-x has the same 11 points found on the K-7.
Also inherited from the K-7 is the latest Prime II image-processing engine. This should have an impact on image processing and the speed of data transfer. In turn, Pentax has been able to increase the shooting rate in the K-x to an impressive 4.7 images per second.
A number of new in-camera image effects have been added to the K-x. A selection of cross-processing filters are available, but the most notable feature is in-camera HDR image capture. This creates a single in-camera HDR image by combining three different camera exposures. It is a feature I recently looked at in detail as a Feature in use when I reviewed the Pentax K-7 against the Nikon D300S (AP 17 October).
So while the Pentax K-x may have inherited its camera body from the K-m, there are a number of changes that have taken place inside the camera that should produce marked improvements in the K-x.