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Nikon D40 wide-angle uniformity comparison
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To measure and compare the Nikon D40's
kit lens vignetting and light fall-off we photographed a white target with a
highly diffused custom filter using it and a number of rival models.
Here are the results for each camera with their kit lenses set to their
widest focal lengths with the apertures wide open and the focus set to infinity.
The images were analysed with Imatest and the full areas presented here
at a reduced resolution. Bigger percentages are better.
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DX 18-55mm II at 18mm f3.5
Mean corner fall-off: 52.1% |
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| The image above was taken with the Nikon D40 using the DX 18-55mm II kit lens zoomed-out to 18mm with its aperture wide open. Here the light falls off in the corners to an average of 52.1% of the centre
measurement. This is a worse result than the other kit lenses shown here and the darkening in the corners of the frame above are quite visible. |
Canon 400D / XTi
Using EF-S
18-55mm |
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Canon PowerShot G7 |
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Olympus E-400
Using ZD 14-42mm |
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EF-S 18-55mm at 18mm f3.5
Mean corner fall-off: 68.8% |
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7.4-44.4mm at 7.4mm f2.8
Mean corner fall-off: 73% |
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ZD 14-42mm at 14mm f3.5
Mean corner fall-off: 63.6% |
Nikon D40 telephoto uniformity comparison
 |
|
To measure and compare the Nikon D40's
kit lens vignetting and light fall-off we photographed a white target with a
highly diffused custom filter using it and a number of rival models.
Here are the results for each camera with their kit lenses set to their
longest focal lengths with the apertures wide open and the focus set to
infinity.
The images were analysed with Imatest and the full areas presented here
at a reduced resolution. Bigger percentages are better. |
DX 18-55mm II at 55mm f5.6
Mean corner fall-off: 73.7% |
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The image above was taken with the Nikon D40 using its DX 18-55mm II mm kit lens zoomed-in to 55mm with its aperture wide open. Here the light falls off in the corners to an average of 73.7% of the centre
measurement. Like the other lenses shown here, it's an improvement over the wide angle result, but again the Nikkor lens performs worse than its rivals here. |
Canon 400D / XTi
Using EF-S
18-55mm |
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Canon PowerShot G7 |
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Olympus E-400
Using ZD 14-42mm |
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EF-S 18-55mm at 55mm f5.6
Mean corner fall-off: 83.8% |
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7.4-44.4mm at 44.4mm f4.8
Mean corner fall-off: 81.2% |
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ZD 14-42mm at 42mm f5.6
Mean corner fall-off: 85.7% |
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