The first digital single-lens reflex (DSLR) camera was the Kodak DCS 100, which was developed by Kodak in partnership with the National Aeronautics and Space Administration (NASA) and released in 1991. The Kodak DCS 100 was based on the Nikon F3 SLR camera and used a 1.3 megapixel sensor to capture digital images. It was primarily aimed at professional photographers and was quite expensive, with a price tag of around $20,000.

Prior to the release of the Kodak DCS 100, digital cameras were mostly low-resolution and not suitable for professional use. The Kodak DCS 100 marked a major milestone in the development of digital photography, as it was the first digital camera that could produce high-quality images that were comparable to those produced by film cameras.

Since the release of the Kodak DCS 100, there have been many advances in digital photography and the DSLR market has grown significantly. Today, there are many different brands and models of DSLR cameras available, ranging from entry-level to professional models. DSLR cameras are widely used by photographers of all levels, from amateur enthusiasts to professional photographers.