The Nikon D300 is a 12.3-megapixel semi-professional DX format digital single-lens reflex camera that Nikon Corporation announced on 23 August 2007 along with the Nikon D3 FX format camera. The D300 was discontinued by Nikon on September 11, 2009, being replaced by the modified Nikon D300S, which was released July 30, 2009. The D300S remained the premier Nikon DX camera until the D7100 was released in early 2013.
Nikon D300 with AF-S Nikkor 18-200mm VR lens
Live View of image on LCD screen
CompactFlash memory card inside D300
Nikon D300 with "Solmeta Geotagger N2 Kompass" on top
The Nikon DX format is an alternative name used by Nikon corporation for APS-C image sensor format being approximately 24x16 mm. Its dimensions are about 2⁄3 those of the 35mm format. 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 are referred to as APS-C, including the Canon cameras with a slightly smaller sensor.
CMOS image sensor of the Nikon D90
The Nikon D40 is a DX-format camera. Here, the DX-sized image sensor is exposed.
Vignetting produced by using a DX-format lens on a full-sized 35mm frame.
Nikkor DX lenses are marked with the DX logo.