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Kit lens purple fringing: Canon EOS 400D / XTi vs Nikon D80 vs Sony Alpha A100
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To measure purple fringing caused
by lens chromatic aberrations and sensor blooming, we photographed a test
chart, left, with areas of very high contrast. We tested each kit lens at its
widest and longest focal lengths with the aperture wide open using Aperture Priority mode. The crops are taken from the upper left corner
of the chart and presented here at 100%.
The three lenses performed roughly the same in this test at wide angle, although the Nikkor DX 18-70mm exhibited greater fringing when zoomed-in than its rivals; to be fair though, it is 2/3 of a stop faster. |
Canon 400D / XTi
Using EF-S 18-55mm |
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Nikon D80
Using DX 18-70mm |
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Sony A100
Using DT 18-70mm |
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EF-S 18-55mm at 18mm f3.5 |
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DX 18-70mm at 18mm f3.5 |
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DT 18-70mm at 18mm f3.5 |
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EF-S 18-55mm at 55mm f5.6 |
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DX 18-70mm at 70mm f4.5 |
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DT 18-70mm at 70mm f5.6 |
Kit lens macro: Canon EOS 400D / XTi vs Nikon D80 vs Sony Alpha A100
To measure macro performance we photographed a chart at a distance and focal length
which delivered the maximum possible reproduction. The dark lines are 10mm
apart. Each lens was tested at f8 in Aperture Priority
mode.
While none of the three kit lenses can be described as great for macro work, there are clearly significant differences in their maximum reproducible areas. The Canon EF-S 18-55mm is the clear leader here with an area of 66x44mm, followed by the Sony DT 18-70mm with 82x54mm and finally the Nikkor DX 18-70mm with a disappointing 128x86mm. |
Canon 400D / XTi
Using EF-S 18-55mm |
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Nikon D80
Using DX 18-70mm |
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Sony A100
Using DT 18-70mm |
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18-55mm at 55mm f8
Max area of 66x44mm |
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18-70mm at 70mm f8
Max area of 128x86mm |
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18-70mm at 70mm f8
Max area of 82x54mm |
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