Over the past four years, I've owned an *ist DL, a K100D and a K2000. The new Pentax K-r feels like a huge improvement over its already excellent predecessors.
NEW FEATURES:
The most obvious improvements are the great new features. The K-r now has a dedicated focus assist lamp. In short, it's unintrusive compared to a strobing popup flash and it works great. I can't believe it took Pentax this long to give us this feature.
The K-r also supports both a proprietary lithium ion battery and AA batteries. You'll have to find a special adapter to use AA batteries though. Unfortunately, Pentax didn't bundle the adapter with the body.
K-x users will also be familiar with the in-camera HDR feature. The K-r includes several HDR settings including auto, standard, strong 1, strong 2, and strong 3. HDR mode is easily accessed by pressing the Info button.
Movie mode is available once again, but it's still not particularly robust. You can shoot in 720p at 25fps, which is an odd frame rate. AF isn't available while you're shooting, but I've found that manual focusing is easy enough with the right lens. I didn't have any problems with my FA 35mm.
Auto white-balancing is greatly improved over the K100D and the K2000 also. You can now shoot in tungsten light without having to manually set the WB. No more horribly yellow photos indoors followed by extremely blue photos outdoors when you forget to white balance again!
Finally, my favorite new feature is the selectable 11-point AF. When it's enabled, you can press the OK button to bring up the point selection interface and use the arrow keys to select your focus point. When you're done, press and hold the OK button to close the menu so you can use the arrow keys for other shortcuts again.
INTERFACE:
With each new release, Pentax's interface has improved and the K-r is no exception. For people coming from the older *ist DL and K100D bodies, you'll immediately notice that the four arrow buttons now have double purposes. Instead of pressing FN + right to get to the ISO menu, you just need to press the right arrow button. Users of the K2000 will find the interface very familiar, but still improved. The Info button now brings up the grid of commonly used settings such as HDR modes, JPG/RAW, metering settings, AF mode, etc. Each setting is represented with an icon or text label and moving the cursor over the setting allows you to quickly cycle through the different modes using the dial. It's similar to pressing the OK button the K2000, but now with more options and fewer button presses.
When you preview your last JPG photo, you also get the option to save it as raw. This only works with the last photo taken, probably because the camera only stores the raw data for one photo at a time. This is a great feature for those who prefer to shoot in JPG and still occasionally use raw.
BUILD QUALITY:
The build quality of the K-r is as solid as every previous Pentax dSLR body that I've owned. The battery compartment latch is slightly improved over the K2000 and the K100D. It's a little hard to describe the new latch, but it's easy to use and much harder to accidentally open.
PERFORMANCE:
I loved the low light performance of my K100D and I enjoyed the newer interface and faster AF of my K2000. The K-r again gets the best of both worlds with very clean photos at ISO 1600 and even faster and more decisive autofocus. It's also now capable of shooting at 6fps in continuous mode.
OVERALL:
The Pentax K-r has really exceeded my expectations. The improved performance combined with the new features makes the K-r a joy to use. It's an excellent entry-level dSLR that it will satisfy even more seasoned photographers who want a compact spare body.
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