LensTip.com

Lens review

Venus Optics LAOWA 17 mm f/1.8 MFT II

28 January 2020
Arkadiusz Olech

8. Vignetting

Let's glance at thumbnails, presented below, in order to assess vignetting of the tested lens on JPEG files; these were produced with the help of the Olympus O-MD E-M5 Mark II.

Olympus E-M5 II, JPEG, f/1.8 Olympus E-M5 II, JPEG, f/2.8
Venus Optics LAOWA 17 mm f/1.8 MFT II - Vignetting Venus Optics LAOWA 17 mm f/1.8 MFT II - Vignetting
Olympus E-M5 II, JPEG, f/4.0 Olympus E-M5 II, JPEG, f/5.6
Venus Optics LAOWA 17 mm f/1.8 MFT II - Vignetting Venus Optics LAOWA 17 mm f/1.8 MFT II - Vignetting


Small physical dimensions of the tested lens had to influence the performance in this category. At the maximum relative aperture the brightness loss in frame corners is huge, amounting to as much as 59% (−2.59 EV). In the case of such a small detector as the Micro 4/3 it is a really high result.


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By f/2.8 vignetting decreases to a still visible value of 35% (−1.25 EV), and by f/4.0 it drops further to 22% (−0.73 EV). A low level, descending to the border of perception, is reached by f/5.6 and f/8.0 where we got the following results: 18% (−0.58 EV) and17% (−0.55 EV) respectively. Further stopping down didn't have any measurable influence on vignetting.

Olympus OM-D E-M5 Mark II, JPEG, f/1.8
Venus Optics LAOWA 17 mm f/1.8 MFT II - Vignetting