LensTip.com

Lens review

Carl Zeiss Batis 40 mm f/2 CF

28 August 2020
Maciej Latałło

7. Coma, astigmatism and bokeh

When it comes to coma correction we don't have any reasons to complain. The aberration remains imperceptible in the corners of the APS-C detector; in the corners of full frame the diodes get a bit enlarged but without any noticeable deformations. Overall the performance of the lens can be assessed very positively.

Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh
Center, f/2.8 Corner APS-C, f/2.8 Corner FF, f/2.8
Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh


Astigmatism, understood as an average difference between vertical and horizontal MTF50 function values, amounted to 7.2% and it is a moderate level. As you see, we have no reasons to complain in that category either.


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Defocused circles of light are pleasing to the eye. They are characterized by smooth light spread inside; onion-ring bokeh, a result of employing aspherical elements, is not especially bothersome. Mechanical vignetting is visible but decreases quickly and by f/2.8 its level is already low; by f/4.0 it disappears completely. As you see it's another category where the performance of the Batis remains beyond reproach.

Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh
Center, f/2.8 Corner APS-C, f/2.8 Corner FF, f/2.8
Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh
Center, f/4.0 Corner APS-C, f/4.0 Corner FF, f/4.0
Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh Carl Zeiss Batis 40 mm f/2 CF  - Coma, astigmatism and bokeh