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.
The 1/3 smaller diagonal size of the DX format amounts to a 1/3 narrower angle of view than would be achieved with the 135 film format (35mm film or FX format), using a lens of the same focal length. Strictly in angle-of-view terms, the effect is equivalent to increasing focal length by 50% on a 135 film camera, and so is often described as a 1.5× focal length multiplier.
This effect can be advantageous for telephoto and macro photography as it produces a tighter crop without the need to increase actual focal length. However it becomes disadvantageous for wide angle photography as a wide angle lens for 135 film effectively becomes a normal lens for the DX format (e.g. 28mm × 1.5 = 42mm 135 film equiv.). This has led to the increased development of the DX format-specific lenses for the Nikon F-mount. Since these lenses do not need to cover the 135 film area, they are smaller and lighter than their 135 format counterparts of equal angle-of-view. The production of DX-specific lenses has also enabled the production of affordable wide angle lenses for the format (e.g., 12mm), whereas costly ultra-wide angle lenses from the 135 format were formerly required.
Real sensor size 
Nikon uses DX format sensors of slightly different sizes, although all of them are classified as APS-C (crop factor more than 1.3 and less than 1.7):
|Nikon Coolpix A*||23.6||15.7||4,928||3,264||16.2|
- Coolpix A is a fixed lens, point-and-shoot camera.
Lenses for Nikon DX format 
- 10.5 mm f/2.8G ED AF DX Fisheye
- 35mm f/1.8G AF-S DX NIKKOR
- 40 mm f/2.8G DX Micro-Nikkor
- 10–24 mm f/3.5-4.5G ED-IF AF-S DX
- 12–24 mm f/4G ED-IF AF-S DX
- 17–55 mm f/2.8G ED-IF AF-S DX
- 18–55mm f/3.5-5.6G ED AF-S DX
- 18–55mm f/3.5-5.6G ED AF-S II DX
- 18-70 mm f/3.5-4.5G ED-IF AF-S DX
- 18–135 mm f/3.5-5.6G ED-IF AF-S DX
- 55-200 mm f/4-5.6G ED AF-S DX
Vibration reduction (VR) lenses in DX format 
- 16–85 mm f/3.5-5.6G ED AF-S VR DX
- 18–55 mm f/3.5-5.6G AF-S VR DX
- 18-105 mm f/3.5-5.6G ED-IF AF-S VR DX
- 18-200 mm f/3.5-5.6G ED-IF AF-S VR DX
- 18-200 mm f/3.5-5.6G ED AF-S VR II DX
- 55-200 mm f/4-5.6G ED AF-S VR DX
- 55–300 mm f/4-5.6G ED AF-S VR DX
- 85mm f/3.5 micro ED AF-S VR DX
- 18–300 mm f/3.5-5.6G ED AF-S VR II DX
- "Nikon DX Zoom Lenses". Visual Reference Charts. Retrieved 9-8-2011.
See also 
- Image sensor format
- Nikon F-mount
- List of Nikon F-mount lenses with integrated autofocus motors
- Nikon F-Mount Teleconverter
|Nikon DSLR and MILC timeline (comparison)|