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Nikon DX Sensor Size

Nikon LBCAST DX sensor
Nikon LBCAST DX sensor
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The area exposed on a 35mm camera is 36x24mm (3:2). But what is the area exposed on a Nikon DSLR using a DX sized sensor? Here is a table of Nikon provided information on their DSLR's:
CameraDX Sensor SizeMaximum Resolution
D30023.6 x 15.8 mm4288 x 2848 (1.5056:1)
D2Xs23.7 x 15.7 mm4288 x 2848 (1.5056:1)
D40X23.7 x 15.6 mm3872 x 2592 (1.4928:1)
D7023.7 x 15.6 mm3008 x 2000 (1.5040:1)
The problem is that the published sensor sizes do not contain enough precision, and it appears that different sized sensors result in the same maximum resolution, so something unknown is going on. So we will just ignore published 'sensor size' numbers from Nikon and attempt to figure out the DX sensor size another way.

Use published lens data: An alternative is to visit the Nikon lens web site where many of their lenses have (diagonal) picture angle specifications for traditional 35mm cameras and DSLR DX-size sensors. Using the field of view formulas and the published DX picture angle, we can back out the DX sensor size. Please note that Nikon specifies picture angle as the diagonal angle (not landscape or portrait angle).

After sampling a number of lenses, the end result is that the 'typical' DX sensor size is 23.49±0.03 x 15.66±0.02, with a focal length multiplier of 1.5326±0.002.

Please note that this is based upon Nikon provided lens information. The actual DX sensor size may be different.

Another way: The D300 uses a Sony sensor with a published sensor pixel pitch of 5.49 microns. Multiply by the maximum resolution of 4288x2848 and you get a DX sensor size of 23.541±0.043 x 15.636±0.028, with a focal length multiplier of 1.529±0.003.
Copyright © 2017 Jerry Jongerius