Sony FE 200-600 mm f/5.6-6.3 G OSS
8. Vignetting
| A7R IIIa, APS-C, JPEG, 200 mm, f/5.6 | A7R IIIa, APS-C, JPEG, 200 mm, f/8.0 |
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| A7R IIIa, APS-C, JPEG, 300 mm, f/5.6 | A7R IIIa, APS-C, JPEG, 300 mm, f/8.0 |
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| A7R IIIa, APS-C, JPEG, 400 mm, f/6.3 | A7R IIIa, APS-C, JPEG, 400 mm, f/8.0 |
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| A7R IIIa, APS-C, JPEG, 600 mm, f/6.3 | A7R IIIa, APS-C, JPEG, 600 mm, f/8.0 |
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In case of the smaller detector the problems can be called negligible. At the 200 mm focal length and the maximum relative aperture brightness loss in frame corners is just 18% (-0.59 EV) and it decreases to an imperceptible level of 3% (-0.10 EV), on stopping down the aperture to f/8.0.
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A very similar performance can be observed at the 300 mm focal length. By f/5.6 the vignetting amounts to 15% (-0.46 EV) and it decreases to 4% (-0.12 EV) after applying the f/8.0 aperture.
At the 400 mm the situation doesn't change much. At the maximum relative aperture, f/6.3 in this case, vignetting reaches 13% (-0.39 EV) and it drops to 3% (-0.09 EV), when you stop down the aperture to f/8.0.
Officially the highest vignetting level you observe at the 600 mm focal length but even then the values are low. By f/6.3 this aberration reaches 19% (-0.60 EV) and it decreases to just 8% (-0.23 EV) after applying f/8.0.
What about the full frame? Appropriate thumbnails are presented below.
| A7R IIIa, FF, JPEG, 200 mm, f/5.6 | A7R IIIa, FF, JPEG, 200 mm, f/8.0 |
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| A7R IIIa, FF, JPEG, 300 mm, f/5.6 | A7R IIIa, FF, JPEG, 300 mm, f/8.0 |
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| A7R IIIa, FF, JPEG, 400 mm, f/6.3 | A7R IIIa, FF, JPEG, 400 mm, f/8.0 |
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| A7R IIIa, FF, JPEG, 600 mm, f/6.3 | A7R IIIa, FF, JPEG, 600 mm, f/8.0 |
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In case of the bigger detector the problems are more accented but still they can't be considered serious slip-ups. At the combination of the 200 mm focal length and the f/5.6 aperture vignetting amounts to 33% (-1.17 EV) and it decreases to 14% (-0.44 EV) after applying f/8.0. The stopping down of an additional 1 EV is able to reduce this aberration to a level of 6% (-0.19 EV) which we call imperceptible.
At the 300 mm focal length there are even less problems. At the maximum relative aperture vignetting is 30% (-1.03 EV) and it decreases to 15% (-0.47 EV) on stopping down the aperture to f/8.0. By f/11.0 the problem reaches just 7% (-0.21 EV) so is simply marginalized.
At the maximum focal lengths you notice the increase of vignetting. At 400 mm and f/6.3 the brightness loss in frame corners reaches 34% (-1.19 EV). Fortunately it decreases to 18% (-0.58 EV) by f/8.0 and to just 6% (-0.18 EV) by f/11.0.
At the 600 mm focal length and by f/6.3 this aberration gets to its highest level of 44% (-1.65 EV). By f/8.0 it decreases to 27% (-0.92 EV), and by f/11.0 it becomes practically imperceptible, reaching just 10% (-0.32 EV).
In this category the Sony prevails in the duel with the Tamron 150-500 because the maximum vignetting levels of the Tamron changed from 47% to 45% with the increase of the focal length from the minimum to the maximum one.
| Sony A7R IIIa, 200 mm, JPEG, f/5.6 |
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| Sony A7R IIIa, 300 mm, JPEG, f/5.6 |
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| Sony A7R IIIa, 400 mm, JPEG, f/6.3 |
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| Sony A7R IIIa, 600 mm, JPEG, f/6.3 |
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