Voigtlander Nokton 35 mm f/1.2 X / Z review - Vignetting

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Voigtlander Nokton 35 mm f/1.2 X / Z

7 November 2022

Maciej Latałło

8. Vignetting

Let's check the vignetting levels of the tested lens for both JPEG and RAW files developped with neutral software.

X-T2, JPEG, f/1.2	X-T2, RAW, f/1.2

X-T2, JPEG, f/1.4	X-T2, RAW, f/1.4

X-T2, JPEG, f/2.0	X-T2, RAW, f/2.0

X-T2, JPEG, f/2.8	X-T2, RAW, f/2.8

It is clear that vignetting is automatically corrected in JPEG files and you can't switch it off. The results are not bad at all. By f/1.2 brightness loss in the frame corners amounts to 35% (−1.25 EV) and it decreases to 31% (−1.10 EV) on stopping down the aperture to f/1.4. By f/2.0 this aberration drops to 19% (−0.62 EV), and by f/2.8 to 11% (−0.35 EV). By f/4.0 the problem disappears practically completely because the result we got there amounted to just 4% (-0.11 EV).

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Of course the real situation can be observed only by analyzing RAW files. In this case at the maximum relative aperture vignetting amounts to 60% (−2.67 EV). It is a very high value – but you have to keep in mind that you deal here with a very fast lens. Apart from that fast lenses designed for full frame mirrorless cameras usually have vignetting that exceeds 3 EV so a level of -2.67 EV is not especially shocking.

By f/1.4 vignetting decreases to 56% (-2.39 EV), and by f/2.0 it is 41% (-1.54 EV). Near f/2.8 you start to see a moderate level of this aberration with a result of 29% (-0.98 EV). The values keep decreasing also by f/4.0 and f/5.6 where light fall-off is, respectively, 20% (-0.65 EV) and 18% (-0.56 EV). Further stopping down doesn't have any measureable influence on the aberration described in this chapter.

Fujifilm X-T2, JPEG, f/1.2