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SONY A550, A500也推出HDR功能, 比起Pentax K7又更上一層樓, 處理速度僅有2秒(K7要12秒), 還能手持攝影(K7需上腳架).
Sony isn't the first to include in-camera HDR capability in a digital SLR: It was included in Pentax's K-7, a camera we've just reviewed. Pentax's implementation needs not only a static subject, but also requires the camera to be placed on a tripod, as the camera can't micro-align the three shots required to assemble a high dynamic range image. It's also rather slow, taking around 12 seconds of processing to create a single HDR image. Sony's HDR mode can micro-align the source images in-camera, which will result in a little cropping of the final image, but means handheld HDR shooting is possible. The Sony A550 is also significantly faster, requiring only two seconds of processing per HDR image. As with Pentax's HDR mode, the Sony A550 can only save HDR images as JPEG files, and doesn't save the separate source images used to create the final HDR shot. Sony's HDR mode captures two shots with anywhere from 1 to 3 EV between the exposures, set in 0.5 EV increments.
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