Editing Chromatic aberration (section)

==Photography==
The term "[[purple fringing]]" is commonly used in [[photography]], although not all purple fringing can be attributed to chromatic aberration.
Similar colored fringing around highlights may also be caused by [[lens flare]]. Colored fringing around highlights or dark regions may be due to the receptors for different colors having differing [[dynamic range]] or [[Film speed|sensitivity]] – therefore preserving detail in one or two color channels, while "blowing out" or failing to register, in the other channel or channels. On digital cameras, the particular [[demosaicing]] algorithm is likely to affect the apparent degree of this problem. Another cause of this fringing is chromatic aberration in the very small [[microlens]]es used to collect more light for each CCD pixel; since these lenses are tuned to correctly focus green light, the incorrect focusing of red and blue results in purple fringing around highlights. This is a uniform problem across the frame, and is more of a problem in CCDs with a very small [[pixel pitch]] such as those used in compact cameras. Some cameras, such as the Panasonic [[Lumix]] series and newer [[Nikon]] and [[Sony]] [[DSLR]]s, feature a processing step specifically designed to remove it.

On photographs taken using a digital camera, very small highlights may frequently appear to have chromatic aberration where in fact the effect is because the highlight image is too small to stimulate all three color pixels, and so is recorded with an incorrect color. This may not occur with all types of digital camera sensor. Again, the de-mosaicing algorithm may affect the apparent degree of the problem.

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Nearsighted color fringing -9.5 diopter - Canon PowerShot A640 thru glasses - closeup detail.jpg|Color shifting through corner of eyeglasses
Purple fringing.jpg|Severe [[purple fringing]] can be seen at the edges of the horse's forelock, mane, and ear.
File:Filigranski nakit 02 edit.JPG|This photo taken with the lens aperture wide open resulting in a narrow depth-of-field and strong axial CA. The pendant has purple fringing in the near out-of-focus area and green fringing in the distance. Taken with a [[Nikon D7000]] camera and an AF-S Nikkor 50mm f/1.8G lens.
</gallery>

===Black-and-white photography===

Chromatic aberration also affects black-and-white photography. Although there are no colors in the photograph, chromatic aberration will blur the image. It can be reduced by using a narrow-band color filter, or by converting a single color channel to black and white. This will, however, require longer exposure (and change the resulting image). (This is only true with [[panchromatic film|panchromatic]] black-and-white film, since [[orthochromatic]] film is already sensitive to only a limited spectrum.)