Nikon DX Format

The Nikon DX format is an alternative name used by Nikon corporation for APS-C image sensor format being approximately 24×16 mm. Its dimensions are about 2/3 (29mm vs 43mm diagonal, approx.) those of the 35mm film or "Full Frame" digital formats (e.g., Nikon's FX format), yielding roughly 43% of the sensor area. The format was created by Nikon for its digital SLR cameras, many of which are equipped with DX-sized sensors. DX format is very similar in size to sensors from Pentax, Sony and other camera manufacturers. All referred to as APS-C including the slightly smaller Canon cameras.

Nikon has produced a relatively small variety of lenses for the DX format, most of which are consumer-level zoom lenses. Nikon has only produced eight digital SLRs - the D3, D3S, D3X, D700, D800, D800E, D4 and D600 - that feature the larger Nikon FX format sensor that is the size of the 135 film format.

Recently, Nikon introduced a consumer camera with a DX-sized sensor, the Coolpix A, featuring an 18.5mm lens.

Read more about Nikon DX Format:  Implications, Real Sensor Size