Nikon Nikkor AF 50 mm f/1.4D
7. Coma and astigmatism
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In lenses of this class a „soapy” effect by f/1.4 must have its source so off-axis aberrations, like coma or astigmatism, can’t be on a negligible level. In the case of the Nikkor 1.4/50 coma is visible as you can see very well in the photos below. The problem is significant and it doesn’t disappear even on stopping down the aperture to f/2.0. We must honestly admit, though, that the rivals don’t manage significantly better in this category.
The value of astigmatism, measured in our test, amounted to 5.5%. It is a very good result but the competitors fare as well (the Canon – 4.5%, the Sony- 6%, the Pentax – 7%).
