Samyang AF 85 mm f/1.8 P FE
8. Vignetting
| A7R IIIa, APS-C, f/1.8 | A7R IIIa, APS-C, f/2.8 |
|
|
Even at the maximum relative aperture vignetting is not especially bothersome, reaching a slight value of 24% (-0.79 EV). Reducing the aperture to f/2.0 doesn't provide any more distinct effect, with vignetting decreasing very slightly, this time to 23% (-0.76 EV). By f/2.8 for a change all problems end with a level of just 8% (-0.23 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 a bigger full frame sensor there are far more problems and photos below illustrate them pretty well.
| A7R IIIa, FF, f/1.8 | A7R IIIa, FF, f/2.0 |
|
|
| A7R IIIa, FF, f/2.8 | A7R IIIa, FF, f/4.0 |
|
|
At the maximum relative aperture we got a pretty high result, reaching 51% (−2.09 EV), higher than in case of most of the rivals. The Nikkor showed here 43%, the Panasonic 45% and the Viltrox 48%. Only the Sony dealt a tad weaker, as in its case the brightness loss in frame corners reached as much as 58%.
By f/2.0 this aberration gets to 49% (-1.95 EV), by f/2.8 it drops to 30% (-1.02 EV), and by f/4.0 it amounts to19% (-0.60 EV). Problems in this category end almost completely by f/5.6 and f/8.0 where we see, respectively, 13% (-0.41 EV) and 12% (-0.37 EV). Further stopping down of the aperture doesn't provide any measurable effects.
Taking into account really small dimensions of the tested Samyang I have to admit I expected a weaker performance.
| Sony A7R IIIa, JPEG, f/1.8 |
 |
