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Lens review

Canon EF 100 mm f/2.8 Macro USM

23 October 2009
Szymon Starczewski

7. Coma and astigmatism


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Coma is not a problem for the tested lens. The diode image in the frame corner remains circular and almost not deformed at all.

Canon EF 100 mm f/2.8 Macro USM - Coma and astigmatism

A bit more problematic can be astigmatism, which , understood as an average difference between horizontal and vertical MTF50 function values, amounted to 8%.