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Lens review

Samyang 16 mm f/2.0 ED AS UMC CS

21 August 2013
Szymon Starczewski

7. Coma, astigmatism and bokeh

Coma is not corrected in a perfect way - it is clearly seen in the corner of the frame at the maximum relative aperture. Still it would be difficult to call that aberration high – we’ve seen examples of much worse correction of that one.

Samyang 16 mm f/2.0 ED AS UMC CS - Coma, astigmatism and bokeh


The lens doesn’t have any astigmatism problems. An average difference between horizontal and vertical MTF50 values amounted to just 3% which we consider to be very low.

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We don’t have any reservations about defocused images either. It is true that in the circles you can notice the ‘onion’ structure but it remains delicate, without any local extremes. The edge of the circles also looks good – without any pronounced light or dark rims.

Samyang 16 mm f/2.0 ED AS UMC CS - Coma, astigmatism and bokeh