Nikon Nikkor AF Micro 60 mm f/2.8D
7. Coma and astigmatism
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At the maximum aperture the coma’s influence on the diode picture in the corner of the frame is present, but the level isn’t very large. It is between the medium and large level. Fortunately, stopping down the lens by one stop almost completely eliminates the defect.
The situation with astigmatism is significantly better. The average difference between the horizontal and the vertical MTF50 values was only 5%.
