The DX format is an alternative name used by Nikon for an APS-C image sensor format. It is approximately 24 x 16 mm, its dimensions are about 2/3 those of the 35 mm film format. Nikon created the DX for its digital SLR cameras. The DX format is very similar in size to sensors from other camera manufacturers (Canon, Pentax, and Sony) as ASPC-C, so the terms are often used interchangeable. The 1/3 smaller diagonal size of the DX format amounts to 1/3 narrow angle of view. This can be advantageous for telephoto and macrophotography, but disadvantageous for wide angle photography.
The FX format refers to a full-frame DSLR camera fitted with an image sensor that is the same size as a 35 mm (36 x 24 mm) film frame. Today, the majority of digital cameras, both compact and SLR modesl, use a smaller than 35 mm frame. This is because it is easier and cheaper to manufacture smaller imaging sensors. FX cameras are very the top of the line-- they are expensive and will continue to be for a long time. Full-frame DSLR cameras are especially good for wide angle photography. Another major advantage is the larger pixel size, which provides wider dynamic range and lower noise at high ISO levels.
Elyse
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