![]() ![]() The lens is effectively rectilinear.īokeh, the quality of the out of focus areas in an image, is smooth, and with some shots, the background highlights take on a swirly effect, with the shape of the bokeh changing depending where it is in the image. It can be cured in software.Īpochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.įor this review, the lens was tested on a Pentax K-1 using Imatest.ĭistortion is almost non-existent, measuring at +0.33% pincushion. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. ![]() ![]() Chromatic aberration (CA) is the lens' inability to focus on the sensor or film all colours of visible light at the same point.
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