Sigma A 35 mm f/1.2 DG II
8. Vignetting
| A7R IIIa, APS-C, f/1.2 | A7R IIIa, APS-C, f/1.4 |
|
|
Even at the maximum relative aperture, vignetting remains moderate, reaching 31% (-1.06 EV). Stopping down the aperture to f/1.4 means decreasing this aberration to 23% (-0.76 EV), and by f/2.0 the vignetting becomes almost completely imperceptible, dropping to 10% (-0.30 EV).
Please Support UsIf you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free. |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
After passing to the bigger full frame sensor there are far more problems, and it is clearly visible in photos we present below.
| A7R IIIa, FF, f/1.2 | A7R IIIa, FF, f/1.4 |
|
|
| A7R IIIa, FF, f/2.0 | A7R IIIa, FF, f/2.8 |
|
|
At the maximum relative aperture the lens's result is very high, reaching 66% (−2.92 EV). Still, this result is noticeably lower than 73%, shown by the older Sigma A 35 mm f/1.2 DG DN, and, at the same time, similar to 64% provided by the Viltrox. In this category the big and heavy Nikkor performed the best, with a result of 57%.
By f/1.4 this aberration reaches 58% (-2.54 EV), by f/2.0 it drops to 39% (-1.42 EV), and by f/2.8 it amounts to 30% (-1.01 EV). Some issues remain visible by f/4.0 and f/5.6, where the vigetting levels are, respectively, 26% (-0.87 EV) and 25% (-0.84 EV). Further stopping down of the aperture doesn't provide any measureable effects. It's interesting that the Sigma, despite being smaller than the Viltrox, better reacts on stopping down and from f/2.0 it manages to outperform its rival.
| Sony A7R IIIa, JPEG, f/1.2 |
 |
