The Nikon CX format is an image sensor format by Nikon for the Nikon 1 series MILCs featuring the Nikon 1 mount bayonet and lenses. With 2.7 times crop factor being approximately 13.2 x 8.8mm2, it considerably increases the depth of field by 2.90 stops compared to a 35mm FX camera with the same angle of view. The format was announced in September 2011 by Nikon for its mirrorless interchangeable-lens cameras, the Nikon 1 series.