The German print magazine, ColorFoto (
colorfoto.de), recently did a test of various image stabilization systems (17 in all used by nine manufacturers). The Pentax K10D with kit lens was included in the test. Other DSLR's in the same general price range were the Nikon D80 with 18-200 VR (Vibration Reduction) lens, Canon EOS 30D with 17-55 IS (Image Stabilizer) lens, and Sony Alpha DSLR-A100 with kit lens.
The shake reduction system employed by the Pentax K10D came out on top of the four with a score of 85% (described as excellent for this price range by the magazine), followed by the Nikon D80/18-200 VR with a score of 78%, the Canon 30D/17-55 IS with a score of 77%, and the Sony A100 with a score of 51%. Each score is in comparison to 100% with the unshaken camera.
If you read German, the entire article can be purchased and downloaded here...
colorfoto.de - Anti-Wackelsysteme im Vergleich
All cameras were tested at the same focal length of 35mm (equivalent), using exposure times of one half and one quarter seconds. The tests were done using a laboratory shaker at frequencies of 2 Hz for normal conditions and 4 Hz to provide extreme conditions. With each camera, an image was first taken without movement and then again with movement & shake reduction. To eliminate camera variables, images from each camera were compared only against images taken by the same camera.
To determine the basic test conditions (2 & 4 Hz), the Bradley J. Davis/John O’Conell method of amplitude measurement of human physiological tremor in regard to holding photographic cameras was adopted. To eliminate human varibles in the final image evaluations, the Siemens Spatial Frequency Response (SFR) method was used for blur estimation. This method was developed in cooperation between Dietmar Wueller of Image Engineering and the Cologne University of Applied Sciences. A complete abstract of the testing method (PDF in English) can be see here...
http://digitalkamera.image-engineering.de/downloads/EI_2007_6502_22.PDF
In addition to proving the SR system employed by the K10D is indeed very nice, the results also directly contradict commonplace notions that in-lens stabilization is superior to in-body stabilization. In-body stabilization can be superior to in-lens stabilization in some situations.
stewart
Last edited by stewart_photo; 08-02-2007 at 02:38 PM.
Reason: Clarification: ...2 Hz "for normal conditions"