Pentax *istDL review with 18-55mm f3.5~5.6 DA lens
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Written by Gordon Laing
Pentax *istDL wide-angle uniformity comparison
Canon EOS-350D |
Konica Minolta Dynax 5D |
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% |
Pentax *istDL 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 Pentax *istDL and the 18-55mm DA at 55mm f5.6. The light falls off to an average of 81.1% in the corners, which while similar to the Canon lens, is worse then the Konica Minolta and Nikon results. |
Canon EOS-350D |
Konica Minolta Dynax 5D |
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% |
Results continued…
Outdoor / Resolution / Noise / Corner sharpness / Fringe and macro / Geometry / Vignetting
