Sony FE 85 mm f/1.4 GM II
8. Vignetting
| A7R IIIa, APS-C, f/1.4 | A7R IIIa, APS-C, f/2.0 |
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Even at the maximum relative aperture vignetting is not especially high because it reaches a slight value of 23% (-0.76 EV). The problem disappears practically completely by f/2.0 and f/2.8, where we got the following results: 10% (-0.31 EV) and 3% (-0.09 EV).
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After passing to the bigger full frame sensor there are noticeably more problems and photos, presented below, show them rather well.
| A7R IIIa, FF, f/1.4 | A7R IIIa, FF, f/2.0 |
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| A7R IIIa, FF, f/2.8 | A7R IIIa, FF, f/4.0 |
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At the maximum relative aperture we got a high result, reaching 49% (−2.07 EV). Of course you should mention the fact that it's still better than the result of the predecessor, that of 54%. Still, it is interesting that vignetting of the Sony FE 85 mm f/1.4 GM II decreases quite slowly on stopping down the aperture. By f/2.0 this aberration is 35% (-1.26 EV), by f/2.8 it decreases to 32% (-1.12 EV), and by f/4.0 it amounts to 28% (-0.94 EV). It also remains visible by f/5.6 and f/8.0, where we got the following results: 22% (-0.73 EV) and 16% (-0.52 EV) respectively. All problems in this category end completely only by f/11 and f/16, where we measured the following values: 11% (-0.33 EV) and 7% (-0.21 EV).
| Sony A7R IIIa, JPEG, f/1.4 |
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