Canon EF 24-105 mm f/4L IS USM
7. Coma and astigmatism
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An influence of coma on the image quality at the frame edge is the most noticeable at 24 and 70 mm focal length but even there its level can be assessed as medium. At 40 and 105 mm the coma is low.
There will be no problems with astigmatism either because in the case of the tested lens its level reached 4.4% so it should be considered as low.
