Pentax *istDL review with 18-55mm f3.5~5.6 DA lens

Pentax *istDL wide-angle uniformity comparison

Canon EOS-350D
Konica Minolta Dynax 5D
Nikon D50
Canon EOS 350D wide angle uniformity test
Konica Minolta wide angle uniformity test
Nikon D50 wide angle uniformity test
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

Pentax *istDL telephoto uniformity test   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
Canon EOS 350D telephoto uniformity test
Konica Minolta telephoto uniformity test
Nikon D50 telephoto uniformity test
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%
Buy Gordon a coffee to support cameralabs!

Like my reviews? Buy me a coffee!

Follow Gordon Laing

All words, images, videos and layout, copyright 2005-2020 Gordon Laing. May not be used without permission. As an Amazon Associate I earn from qualifying purchases.

Website design by Coolgrey