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Chromatic aberrations explained

By Jakob Jelling

Looking at the details of the digital camera features a topic that can be prominently in the front lines is that of the concept of digital camera chromatic aberrations. It is something that requires a lot of introspection as it gets into the real picture much more than any other feature. Thus this discussion is focused towards the analysis of a serious degree regarding the digital camera chromatic aberration.

Looking at very intricate details it can be stated that purple fringing is the most common type of chromatic aberration in digital cameras. Edges of contrast subjects suffer most, especially if the light comes from behind them. Other types exist as well, such as the cyan or green and red fringing. Chromatic aberrations occur more in consumer and pro summer digital compact cameras, but SLRs can suffer from it too. Hence it is not a very specific problem to any particular model but that haunts most of the digital cameras. Hence a detailed retrospection is necessary for this topic of digital camera chromatic aberrations. However, the examples of the most common purple fringing, that of cyan and red fringing too!

The two types of digital camera chromatic aberration are longitudinal or axial chromatic aberration. It can be stated that focal length varies with color wavelength, lateral or transverse chromatic aberration. From an optical point of view, chromatic aberrations are caused by the camera lens not focusing different wavelengths of light onto the exact same focal plane the focal length for different wavelengths is different and/or by the lens magnifying different wavelengths differently. These types of chromatic aberration are referred to as longitudinal chromatic aberration and lateral chromatic aberration respectively and can occur concurrently. The amount of chromatic aberration depends on the dispersion of the glass. In digital cameras, micro lenses can also be a source of chromatic aberration and the visibility of chromatic aberrations is sometimes amplified by blooming.

Looking into it even more in details it can be stated that it seems that there are always a few photographs that manage to have some purple fringing with digital cameras. And, it seems to be the ones that the photographers rather favor the most. The bottom line is that it is an inherent problem with some digital cameras and it normally occurs when an area of a photograph is overexposed. Using software applications such as Adobe Photoshop, it is possible to decrease the visibility of the chromatic aberrations. To understand that how to repair chromatic aberrations with Adobe Photoshop, it has to be noted here that this technique replaces the magenta color with a lighter gray shade. It does not completely fix the problem, but it makes it less visible. The rest are the inherent details that are irrelevant to this discussion.

In the above lines a lot of details have been brought into the light of knowledge and it can be noted in these concluding lines that the success of this discussion lies in the fact of the major acceptance of the knowledge imparted in this discussion!

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