Samyang 35 mm f/1.2 ED AS UMC CS review - Vignetting

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Samyang 35 mm f/1.2 ED AS UMC CS

26 November 2018

Arkadiusz Olech

8. Vignetting

Let’s glance at thumbnails below that allow us to assess the vignetting of the tested lens for JPEG files from the Fujifilm X-T2 camera.

Fujifilm X-T2, f/1.2	Fujifilm X-T2, f/1.4

Fujifilm X-T2, f/2.0	Fujifilm X-T2, f/2.8

In this category the moderate dimensions of the Samyang make themselves felt a bit. At the maximum relative aperture the brightness loss in the frame corners amounts to as much as 47% (−1.86 EV) – it’s a lot for a lens designed for a sensor smaller than full frame. On the other hand we could find several fast standard lenses with vignetting levels noticeably higher. After applying f/1.4 the vignetting decreases to a still distinct value of 37% (−1.51 EV). By f/2.0 and f/2.8 you deal with moderate levels of that aberration, 24% (−0.81 EV) and 21% (−0.67 EV) respectively. Further stopping down doesn’t have any measureable influence over vignetting.

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The lens doesn’t have any contacts so it is not recognizable by a camera body and the vignetting correction is switched off. The performance on RAW files is very similar to the situation you observe on JPEG files, described above.

Fujifilm X-T2, JPEG, f/1.2