Samyang AF 45 mm f/1.8 FE
8. Vignetting
| A7R II, APS-C, f/1.8 | A7R II, APS-C, f/2.0 |
|
|
Small dimensions of the lens mean you can notice vignetting already on the smaller sensor. At the maximum relative aperture that aberration reaches 31% (−1.07 EV) and it decreases to 24% (−0.79 EV) on stopping down the aperture to f/2.0. Problems in this category end practically completely by f/2.8 and f/4.0 where we got the following results: 11% (−0.33 EV) and 10% (−0.30 EV) respectively.
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. |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Now let's check the situation on full frame – appropriate thumbnails you can find below.
| A7R II, FF, f/1.8 | A7R II, FF, f/2.0 |
|
|
| A7R II, FF, f/2.8 | A7R II, FF, f/4.0 |
|
|
According to our expectations there are far more problems here. At the maximum relative aperture brightness loss in frame corners amounts to as much as 64% (−2.99 EV). You can also spot vignetting without any difficulties by f/2.0 and f/2.8 where we got the following results: 60% (−2.68 EV) and 36% (−1.30 EV). Moderate levels are achieved only from f/4.0 onwards, with light fall-off being 27% (−0.92 EV). By f/5.6 the vignetting decreases to 23% (−0.76 EV) and further stopping down doesn't have any measurable influence on this aberration.
| Sony A7R II, JPEG, f/1.8 |
 |
