Many digital cameras, both compact and SLR models, use a smaller-than-35 mm frame as it is easier and cheaper to manufacture imaging sensors at a smaller size.
Historically, the earliest digital SLR models, such as the Nikon NASA F4 or Kodak DCS 100, also used a smaller sensor.
When a lens designed for a full-frame camera, whether film or digital, is mounted on a DSLR with a smaller sensor size, only the center of the lenses image circle is captured.
When used with lenses designed for full frame film or digital cameras, full-frame DSLRs offer a number of advantages compared to their smaller-sensor counterparts.
The full-frame sensor can also be useful with wide-angle perspective control or tilt/shift lenses; in particular, the wider angle of view is often more suitable for architectural photography.
[6] Lower size sensors also allow for the use of a wider range of lenses, since some types of optical impurities (specifically vignetting) are most visible around the edge of the lens.
[9] As a consequence, full-frame DSLRs may produce better quality images in certain high contrast or low light situations.
[10] Modern photolithography equipment now allows single-pass exposures for full-frame sensors, but other size-related production constraints remain much the same.
[25] The first full-frame DSLR cameras were developed in Japan from around 2000 to 2002: the MZ-D by Pentax,[26] the N Digital by Contax's Japanese R6D team,[27] and the EOS-1Ds by Canon.
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