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An increasing number of the more pro-oriented video DSLRs as well as higher-end camcorders provide live HDMI output when shooting video. Originally the purpose of this connector was to allow attaching a TV monitor so that the cinematographer and crew could easily see what was being shot. The HDMI connector from a camera is the same as what one uses to connect a Blu Ray player or amp to a high end TV or monitor. It passes a very high bandwidth uncompressed signal consisting of video as well as audiio.
Recently,someDSLR camera makers woke up, smelled the coffee, and realized that there was a demand for using HDMI to not just monitor a camera's output but also record it. The signal on HDMI can be as high a 5 Gbps for 1080P (that's billions of bits per second). Now compare this to the typical recording bandwidth of  24Mbps for a camcorder or video DSLR shooting with the AVCHD codec. 25 million vs. 5 billion.
Well, there's no affordable recorder that can handle a 5Gbps video data-str...

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Michael Reichmann
Michael Reichmann
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Michael Reichmann is the founder of the Luminous Landscape. Michael passed away in May 2016. Since its inception in 1999 LuLa has become the world's largest site devoted to the art, craft, and technology of photography. Each month more than one million people from every country on the globe visit LuLa.
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