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        This device was an analogue electronic device with interchangeable lenses and a reflex viewfinder 4 .In 1989 , Canon offers the Xapshot, for the general public, which has a resolution of 786 × 300 points . It is followed by models dubbed "Ion". These first models are not really digital, because the image, if it is well captured by a matrix of dots, is so stored analog of magnetic memories 4.In 1991 , Kodak Digital Science department of Kodak released a digital back for a SLR camera classic, the Nikon F3.
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