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Pentax *istDL purple fringing comparison
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To measure purple fringing caused
by lens chromatic aberrations and sensor blooming, we photographed a custom
test chart, left, with areas of very high contrast. We used the bundled
lenses at their widest and longest focal lengths with the aperture wide
open in Aperture Priority mode. The crops are taken from the upper left
corner of the chart and presented here at 100%. The Pentax *istDL with the 18-55mm DA lens exhibits a little purple fringing at its widest position in line with its rivals. Fringing is virtually eliminated at 55mm, like most of the competition.. |
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Pentax *istDL
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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 DA at 18mm f3.5
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18-55mm EF-S at 18mm f3.5
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18-70mm DT at 18mm f3.5
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18-55mm DX at 18mm f3.5
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18-55mm DA at 55mm f5.6
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18-55mm EF-S at 55mm f5.6
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18-70mm DT at 70mm f5.6
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18-55mm DX at 55mm f5.6
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Pentax *istDL macro comparison
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To measure macro performance we
photographed a custom chart using the bundled lenses at a distance and focal
length which delivered the maximum possible reproduction. The dark lines
are 10mm apart. The image left was taken with the Pentax *istDL and the 18-55mm DA lens at f8. Like other budget digital SLR lenses, the best macro performance was achieved using its longest focal length of 55mm. Here the lens captured an area measuring 66x44mm from a distance of 12cm. This is essentially the same as the competition, although superior to Konica Minolta. |
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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 f8 Max area of 66x44mm at 13cm |
18-70mm DT at 70mm f8 Max area of 82x54mm at 20.5cm |
18-55mm DX at 55mm f8 Max area of 70x49mm at 13cm |
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