For gadgets, mergers can be a risky proposition. The union of the MP3 player and the cell phone didn't work out, though later the cell phone did hit it off with a low-resolution still camera. This month Samsung presides over the long-awaited combination of the digital camcorder and the high-resolution digital camera. The two make a handsome couple. As obvious as the merger sounds, it's difficult to couple the two because they use different types of lenses and image sensors. The SC-D5000 "Duo-cam" ($1,399) allows the user to select video or still images by swiveling the appropriate lens into place. The...
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