LensTip.com

Lens review

Samyang 100 mm f/2.8 ED UMC MACRO

22 August 2015
Arkadiusz Olech

5. Chromatic and spherical aberration

Chromatic aberration

As you see in the crops below, the tested lens has no problems whatsoever with the longitudinal chromatic aberration. You don’t even have to close down the aperture because the image you get with the lens wide open is practically free of that optical aberration.

Samyang 100 mm f/2.8 ED UMC MACRO - Chromatic and spherical aberration


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The correction of the lateral chromatic aberration can be described in similar terms – its performance, depending on the aperture value and the size of the detector, presents the graph below.

Samyang 100 mm f/2.8 ED UMC MACRO - Chromatic and spherical aberration


No matter what detector or aperture you employ, the Samyang 2.8/100 keeps a constant level of about 0.05%. We consider such a result as slight so the performance in this category should be assessed very high.

Canon 5D III, f/2.8 Canon 5D III, f/5.6
Samyang 100 mm f/2.8 ED UMC MACRO - Chromatic and spherical aberration Samyang 100 mm f/2.8 ED UMC MACRO - Chromatic and spherical aberration



Spherical aberration

First photos in this chapter don’t show any „focus shift” effect so the spherical aberration cannot be high. Defocused circles of light confirm that conclusion. A soft edge of the image in front of the focus and a bit lighter rim of the circle behind the focus are the only flaws we were able to notice.

Canon 5D III, f/2.8, in front of Canon 5D III, f/2.8, behind
Samyang 100 mm f/2.8 ED UMC MACRO - Chromatic and spherical aberration Samyang 100 mm f/2.8 ED UMC MACRO - Chromatic and spherical aberration