Canon EF-S 60 mm f/2.8 Macro USM
7. Coma and astigmatism
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Taking into account excellent image quality at the center of the frame, we didn’t expect any slip-ups in this category. Pictures and measurements confirm our expectations. As you can see from the clippings below, coma is difficult to see even at the maximum aperture.
It’s equally great in the case of astigmatism. Its value, understood as the average difference between the horizontal and vertical MTF50 values was only 2.7%.
