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Pentax smc FA 31 mm f/1.8 AL

14 October 2011
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Arkadiusz Olech

5. Chromatic aberration

The crops below show that the longitudinal chromatic aberration we can describe as medium. What’s interesting, it reacts weakly to stopping down the aperture because by f/1.8 and f/2.5 it remains very much the same.

Pentax smc FA 31 mm f/1.8 AL - Chromatic aberration


A better situation can be seen in the case of the lateral chromatic aberration. At the maximum relative aperture it reaches the medium level but on stopping down it decreases swiftly and becomes imperceptible. Here the Pentax fares definitely better than the Nikkor AF-S DX 1.8/35 and a bit better than the Sony DT 1.8/35.


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Pentax smc FA 31 mm f/1.8 AL - Chromatic aberration

Pentax smc FA 31 mm f/1.8 AL - Chromatic aberration



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