Canon EF 70-200 mm f/2.8L IS II USM review - Coma and astigmatism

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Canon EF 70-200 mm f/2.8L IS II USM

3 November 2010

Arkadiusz Olech

7. Coma and astigmatism

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The new Canon 70-200 mm f/2.8 IS corrects the coma very well. Even in the very corner of the full frame sensor in the whole focal range and after attaching the converter, the image of the diode remains almost not deformed at all. Another big plus for the Canon.

Canon EF 70-200 mm f/2.8L IS II USM - Coma and astigmatism

When it comes to the astigmatism, the lens’s performance is also beyond reproach. The average difference between the vertical and horizontal MTF50 values amounted to 4.8% which is a very good result. The astigmatism increases a bit after attaching the converter to the lens as its value amounts to 8%, but still it is a result you really don’t have to bother yourself with.