LensTip.com

Lens review

Samyang 135 mm f/2.0 ED UMC

5 July 2015
Arkadiusz Olech

7. Coma, astigmatism and bokeh

The coma correction of the Samyang is really beyond reproach. Even in the corners of full frame the image of the diode is devoid of any deformations. It should be noticed, though, that similar performances we also observed in the case of the Canon 2/135L and the Zeiss Apo Sonnar 2/135. All three lenses represent in this category a really even and very high level.

Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh
Center, f/2.8 Corner APS-C, f/2.8 Corner FF, f/2.8
Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh


The astigmatism understood as an average difference between horizontal and vertical MTF50 function values amounted to 3.8%; it is a low value. The Zeiss 2/135 had a very similar result – that of 3.5%. The Canon 135L was the best of all in this category as its result amounted to just 1.8%. Once again you should say all those three lenses represent a very even and quite high level of performance.


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The blurs provided by the Samyang 2/135 are very pleasing to the eye. It is confirmed by the appearance of defocused light circles which come without any distinct local extremes. The only thing that might make you complain is a significant truncation of the circle in the full frame corner at the maximum relative aperture.

Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh
Center, f/2.8 Corner APS-C, f/2.8 Corner FF, f/2.8
Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh
Center, f/4.0 Corner APS-C, f/4.0 Corner FF, f/4.0
Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh Samyang 135 mm f/2.0 ED UMC - Coma, astigmatism and bokeh