Sigma 105 mm f/2.8 EX DG OS HSM Macro
8. Vignetting
Our measurements confirm it. At the maximum relative aperture the brightness loss in the frame corners amounts to 24% (-0.80 EV) which is not bothersome. On stopping down to f/4.0 we see this aberration disappear almost completely as the result is on the level of only 5% (-0.15 EV). The chart below shows the comparison between the Sigma and its rivals. It is clear the level of all three of them, presented in this category, is quite evened out.
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. |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
Sigma 105 OS |
Nikkor 105 VR |
Canon 100 IS |
| f/2.8 |
24% |
25% |
20% |
| f/4.0 |
5% |
5% |
5% |
Let’s tackle the full frame performance now. One glance at thumbnails below and it becomes obvious the problems start getting more serious.
At the maximum relative aperture the vignetting reaches as high as 54% (-2.25 EV) and it is noticeably bigger than that of the Sigma’s immediate rivals. On stopping down to f/4.0 you see this aberration limited considerably but it remains visible and its level is 26% (-0.87 EV). Only by implementing f/5.6 you can make the problem disappear almost completely (7%).
|
|
Sigma 105 OS |
Nikkor 105 VR |
Canon 100 IS |
| f/2.8 |
54% |
42% |
43% |
| f/4.0 |
26% |
26% |
20% |
| f/5.6 |
7% |
12% |
8% |
 |
