Many animals have body symmetry with distinct front and back ends. This type of symmetry is bilateral symmetry. Animals with bilateral symmetry have one line that divides them into two mirror images.
Here, the DX-sized image sensor is exposed. Comparison of image sensor sizes, including Nikon DX. 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 2â3 (29 mm vs 43 mm diagonal, approx.) 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.
Midrange film zooms got no wider than 24mm, which only gave a normal angle of view on DX cameras. Nikon also introduced various DX midrange zooms starting at 17mm or 18mm, which due to the crop factor, were zooms which started out with a field of view similar to what a 28mm lens sees on a 35mm film or FX camera.