LensTip.com

Lens review

Sony 50 mm f/2.8 Macro

31 May 2010
Arkadiusz Olech

7. Coma and astigmatism



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The coma is corrected very well as you might find out glancing at the picture below. The diode image in the frame corner doesn’t differ much from the image of the same diode in the frame centre. You can still notice some slight influence of this aberration but it shouldn’t be a reason to complain.

Sony 50 mm f/2.8 Macro - Coma and astigmatism

The same can be said in the case of the astigmatism. The average difference between vertical and horizontal MTF50 function values in this case amounted to 7%. The 5% level of perfection was exceeded a bit but the difference is again so small that we shouldn’t carp about it at all.