Heres a short article on Pentax K20D/K200D HDR.
Source from: http://apcmag.com
The Pentax K20D and the Pentax K200D both use a new metering system which allows their CMOS sensors to take simultaneous readings of both highlight and shadow areas.
The user then simply needs to access the camera's HDR mode through the menu dial, set the camera up for the first shot, press the shutter, and off it goes. The internal sensors will then take three shots and combine them into a single HDR image.
How it works
Firstly, the standard correct exposure photograph is metered and exposed. The onboard sensors then independently calculate an overexposed image and an underexposed image.
Within seconds, the K20D and the K200D will have taken three separate photographs and will begin the process of merging them into a single HDR image. Control is limited as the only control the user has over the process is to decide whether the camera will expose the over and underexposed images at one or two stops above or below correct exposure.
Once all three photos are taken, the contrasting areas of the images are compared, balanced and combined into a single picture which displays a broader dynamic range than a conventional photograph, allowing for more evenly exposed images and a more natural look. With LiveView, the results can be instantly previewed, and the process repeated if necessary.
BE WARNED: Pentax's HDR capability is still strictly limited to still life or scenery photography only. If your subject is moving, it wont work (unless you get everybody to stand really still).
However, with the introduction of HDR in mid-range DSLR cameras, we can say goodbye to the days of overexposed backgrounds or foregrounds in shadow.
Although these automated results are not as dramatic as those obtained using more traditional methods the quality of the images is still impressive.
Source from: http://apcmag.com
The Pentax K20D and the Pentax K200D both use a new metering system which allows their CMOS sensors to take simultaneous readings of both highlight and shadow areas.
The user then simply needs to access the camera's HDR mode through the menu dial, set the camera up for the first shot, press the shutter, and off it goes. The internal sensors will then take three shots and combine them into a single HDR image.
How it works
Firstly, the standard correct exposure photograph is metered and exposed. The onboard sensors then independently calculate an overexposed image and an underexposed image.
Within seconds, the K20D and the K200D will have taken three separate photographs and will begin the process of merging them into a single HDR image. Control is limited as the only control the user has over the process is to decide whether the camera will expose the over and underexposed images at one or two stops above or below correct exposure.
Once all three photos are taken, the contrasting areas of the images are compared, balanced and combined into a single picture which displays a broader dynamic range than a conventional photograph, allowing for more evenly exposed images and a more natural look. With LiveView, the results can be instantly previewed, and the process repeated if necessary.
BE WARNED: Pentax's HDR capability is still strictly limited to still life or scenery photography only. If your subject is moving, it wont work (unless you get everybody to stand really still).
However, with the introduction of HDR in mid-range DSLR cameras, we can say goodbye to the days of overexposed backgrounds or foregrounds in shadow.
Although these automated results are not as dramatic as those obtained using more traditional methods the quality of the images is still impressive.