Canon EF 16-35 mm f/2.8L II USM
7. Coma and astigmatism
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When it comes to coma, the Canon 16-35 mm gives us some reasons to complain. The deformations of the diode picture are clearly visible in the corner of even small APS-C sensor, although we must admit that the effect is not huge, taking into account such a difficult combination of parameters.
When it comes to astigmatism, the performance is beyond reproach. The average difference between horizontal and vertical MTF50 function values amounted to less than 5 % which is a very good result.
