Nikon Nikkor Z 40 mm f/2.0
8. Vignetting
| Z7, APS-C/DX, f/2.0 | Z7, APS-C/DX, f/2.8 |
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At the maximum relative aperture vignetting is noticeable, reaching 25% (−0.82 EV), but it cannot be called high. By f/2.8 and f/4.0 the aberration decreases to an imperceptible level, reaching respectively 11% (−0.34 EV) and 8% (−0.25 EV).
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After passing to a bigger sensor vignetting becomes more pronounced and photographs below show it very well.
| Z7, FF, f/2.0 | Z7, FF, f/2.8 |
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| Z7, FF, f/4.0 | Z7, FF, f/5.6 |
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The loss of brightness in frame corners at the maximum relative aperture reaches as much as 57% (−2.46 EV). It's a lot but, after all, a much bigger Batis 2/40 showed here a result of 55%, exactly the same within the margin of error.
On stopping down the aperture to f/2.8 vignetting decreases to 41% (−1.51 EV), and by f/4.0 it drops further to 35% (−1.2 EV). Another slight decrease of this aberration can be noticed by f/5.6, where light fall-off reaches 29% (−0.48 EV), and by f/8.0, where we got a result of 23% (−0.77 EV). By f/11.0 and f/16.0 apertures the vignetting reached 20% (−0.63 EV) and 19% (−0.61 EV) respectively.
| Nikon Z7, JPEG, 40 mm, f/2.0 |
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