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Color Fringing

Color fringing, the result of chromatic aberrations [see (1) and (2)] is a problem with many lenses, but is particularly an issue with shift lenses because of their extra-wide field of view, which tends to exacerbate the problem.

Color fringing manifests itself as red and cyan/green borders on higher contrast edges.  In more severe cases, it also results in an overall blurry look to image detail.   Color fringing in a quality lens should not appear in the center of the frame, but will increase as the edges of the image circle is approached.

Here is an example of severe color fringing (actual-pixels crop from D2X with Nikon 10.5mm/f2.8DX, corner of the frame):

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Since 2006, Diglloyd Advanced Photography is the authoritative review and reference for DSLRs and their lenses: Canon and Nikon primarily, but also Pentax and some medium format. Reviews of key DSLRs are included, but the primary focus is on lens performance. Also included is a wealth of technique and workflow approaches.

DAP includes thousands of pages of exclusive coverage and high resolution Retina-grade examples detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare, behavioral and practical usage.

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