Lens review
2009-10-23
Canon EF 100 mm f/2.8 Macro USM
7. Coma and astigmatism
Coma is not a problem for the tested lens. The diode image in the frame corner remains circular and almost not deformed at all.
A bit more problematic can be astigmatism, which , understood as an average difference between horizontal and vertical MTF50 function values, amounted to 8%.
