Canon EOS-350D / Digital Rebel XT wide-angle uniformity comparison
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To measure lens vignetting and light
fall-off we photographed a white target with a highly diffused custom filter.
Here are the results for the bundled lenses at their widest focal lengths
with the apertures wide open in Aperture Priority mode. The images were
analysed with Imatest and the full areas presented here at a reduced resolution.
The image left was taken with the Canon EOS-350D and the 18-55mm EF-S at
18mm f3.5. The light falls off to an average of 68.8% in the corners, which
while better than the Pentax, is well below the Nikon and Konica Minolta
results. |
Konica Minolta Dynax 5D |
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Nikon D50 |
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Pentax *istDL |
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18-70mm DT at 18mm f3.5
Mean corner fall-off: 73.5% |
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18-55mm DX at 18mm f3.5
Mean corner fall-off: 81% |
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18-55mm DA at 18mm f3.5
Mean corner fall-off: 61.8% |
Canon EOS-350D / Digital Rebel XT telephoto uniformity comparison
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To measure lens vignetting and light
fall-off we photographed a white target with a highly diffused custom filter.
Here are the results for the bundled lenses at their longest focal lengths
with the apertures wide open in Aperture Priority mode. The images were
analysed with Imatest and the full areas presented here at a reduced resolution.
The image left was taken with the Canon EOS-350D and the 18-55mm EF-S at
55mm f5.6. The light falls off to an average of 83.8% in the corners, which
is similar to the Pentax but again well below the Nikon and Konica Minolta
results. |
Konica Minolta Dynax 5D |
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Nikon D50 |
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Pentax *istDL |
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18-70mm DT at 70mm f5.6
Mean corner fall-off: 90.1% |
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18-55mm DX at 55mm f5.6
Mean corner fall-off: 90.3% |
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18-55mm DA at 55mm f5.6
Mean corner fall-off: 81.1% |
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