Leica D Vario-Elmarit 14-50 mm f/2.8-3.5 Asph. Mega O.I.S.
7. Coma and astigmatism
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As you see in the picture below, the coma is noticeable in the 14-25 mm range and it decreases significantly at 50 mm. Even at short focal lengths you can hardly call its level high, though.
When it comes to the astigmatism, this aberration won’t disturb us at all. Its level, understood as an average difference between horizontal and vertical MTF50 values, amounted to just 3.7%.
