Samyang AF 35 mm f/1.4 FE
8. Vignetting
| A7R II, APS-C, f/1.4 | A7R II, APS-C, f/2.0 |
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Good results are guaranteed here by the significant physical dimensions of the lens. The vignetting is noticeable only at the maximum relative aperture, where it reaches 27% (−0.91 EV). By f/2.0 and f/2.8 it disappears almost completely, being just 12% (−0.39 EV) and 8% (−0.25 EV) respectively.
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After passing to a bigger full frame sensor there are more problems as illustrated by photos below.
| A7R II, FF, f/1.4 | A7R II, FF, f/2.0 |
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| A7R II, FF, f/2.8 | A7R II, FF, f/4.0 |
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The loss of light at the maximum relative aperture is really huge, reaching 64% (−2.91 EV). The light fall-off is also easy to notice by f/2.0 and f/2.8 apertures, where it is, respectively, 47% (−1.81 EV) and 33% (−1.17 EV). Only by f/4.0 that aberration level can be called moderate, with a result of 27% (−0.91 EV). After employing f/5.6 you see the vignetting decrease again but only slightly; in that place we got a value of 24% (−0.79 EV). Further stopping down of the aperture didn’t have any measureable effect on results of the tested lens in this category.
| Sony A7R II, JPEG, f/1.4 |
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