Digital SLR movie mode patented

Posted on Friday, Feb 22 2008 @ 03:57 CET by Thomas De Maesschalck
Photography Blog spotted a firm has patented a dSLR movie mode technology:
With the pervasiveness of Live View modes from DSLR makers, it is only a matter of time before similar technology brings a “movie mode” to DSLRs. While the ability to record video is a common feature among point & shoot cameras, technological challenges make the incorporation of a video recording more difficult in DSLRs. A recently published patent application by inventor Hiroshi Terada may change all of this. The patent addresses many of the technological hurdles that have prevented incorporation of a movie mode into DSLRs.

As we all know, DSLRs are designed for optimal performance in capturing still images - and DSLR manufacturers have truly raised the bar over the past couple of years. Accordingly, DSLRs are specialist tools that have been optimized to have a very narrow focus tolerance and an ever-increasing auto-focus speed. These features are not quite conducive to smooth video capture. Additionally, the field-of-view changes, albeit slightly, during auto-focus operation. Finally, fast and accurate hand-held auto-focus is dependent up accurate phase-difference AF evaluation, which requires a mirror to reflect the image to the AF sensor.

As you can see, getting live image to the image sensor and capturing smooth, in-focus video seems difficult to achieve without sacrificing some still image capture properties of DSLRs. These obstacles, among others, are what Mr. Terada attempts to overcome in his patent application.

About the Author

Thomas De Maesschalck

Thomas has been messing with computer since early childhood and firmly believes the Internet is the best thing since sliced bread. Enjoys playing with new tech, is fascinated by science, and passionate about financial markets. When not behind a computer, he can be found with running shoes on or lifting heavy weights in the weight room.

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