Venus Optics LAOWA Argus 25 mm f/0.95 MFT
8. Vignetting
| Olympus E-M5 II, JPEG, f/0.95 | Olympus E-M5 II, JPEG, f/1.4 |
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| Olympus E-M5 II, JPEG, f/2.0 | Olympus E-M5 II, JPEG, f/2.8 |
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At the maximum relative aperture brightness loss in the frame corners amounts to 61% (−2.75 EV). It's really a lot for a small Micro 4/3 sensor but you have to remember the fact that this lens's aperture is very fast and it makes things more tricky. Fortunately vignetting decreases very fast on stopping down. By f/1.4 it still remains significant, reaching 44% (−1.70 EV), but by f/2.0 it is already moderate, amounting to 24% (−0.80 EV). All problems end by f/2.8 and f/4.0, where we got, respectively, 17% (−0.55 EV) and11% (−0.34 EV).
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| Olympus OM-D E-M5 Mark II, JPEG, f/0.95 |
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