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In page History of the camera:

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The first digital camera of any kind ever sold commercially was possibly the MegaVision Tessera in 1987[1] though there is not extensive documentation of its sale known. The first portable digital camera that was actually marketed commercially was sold in December 1989 in Japan, the DS-X by Fuji[2] The first commercially available portable digital camera in the United States was the Dycam Model 1, first shipped in November 1990.[3] It was originally a commercial failure because it was black-and-white, low in resolution, and cost nearly $1,000 (equivalent to $2,000 in 2019[4]).[5] It later saw modest success when it was re-sold as the Logitech Fotoman in 1992. It used a CCD image sensor, stored pictures digitally, and connected directly to a computer for download.[6][7][8]