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Olympus E-500 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 cameras at their widest focal lengths with the apertures
wide open and the focus at infinity. The images were analysed with Imatest
and the full areas presented here at a reduced resolution. Bigger percentages
are better. The image left was taken with the Olympus E-500 with the Zuiko Digital 14-45mm lens at 14mm f3.5 (equivalent to 28mm). Here the light falls off in the corners to an average of 74.1% of the center measurement, which is roughly in the middle of the pack. |
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Canon EOS-350D
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Konica Minolta Dynax 5D
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Nikon D50
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| 18-55mm EF-S at 18mm f3.5 Mean corner fall-off: 68.8% |
18-70mm DT at 18mm f3.5 Mean corner fall-off: 73.5% |
18-55mm DX at 18mm f3.5 Mean corner fall-off: 81% |
Olympus E-500 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 cameras at their longest focal lengths with the
apertures wide open and the focus at infinity. The images were analysed
with Imatest and the full areas presented here at a reduced resolution.
Bigger percentages are better. The image left was taken with the Olympus E-500 with the Zuiko Digital 14-45mm lens at 45mm f5.6 (equivalent to 90mm). Here the light falls off in the corners to an average of 71.3% of the center measurement, which is noticeably worse than the kit lenses of its rivals. This vignetting is also visible with the aperture closed down to f8 as can be seen in the telephoto Geometry results earlier. |
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Canon EOS-350D
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Konica Minolta Dynax 5D
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Nikon D50
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| 18-55mm EF-S at 55mm f5.6 Mean corner fall-off: 83.8% |
18-70mm DT at 70mm f5.6 Mean corner fall-off: 90.1% |
18-55mm DX at 55mm f5.6 Mean corner fall-off: 90.3% |
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