Resolution of M43 lenses

Started Mar 31, 2013 | Discussions thread
Detail Man
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Re: Demonstration of Differences in DxO Geometric Corrections
In reply to Detail Man, Apr 2, 2013

The DPR Gallery Originals of the images displayed below are full sized 16 Mpixel loss-less JPGs. Here is a synthetically created DMC-GH2 + LGV 14-140mm lens RW2 "checkerboard" test pattern:

DMC-GH2 + LGV 14-40mm Synthetic RW2 Test Pattern

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Here is what Lightroom 3.6 (with Exposure -2.0 EV, maximum Contrast, no additional gamma correction) does to the RW2 test image when maximum manual barrel Distortion correction is applied. Download the Original image and display in an image-viewer at 20% magnification (which will collapse 5x5 pixel arrays into single display pixels). Note the single central pattern (visible at 20%).

Lightroom 3.6 - Maximum Barrel Distortion Correction - View Original at 20%

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Here is what DxO Optics Pro 7.23 (with Exposure Compensation -2.0 EV, maximum global Contrast, no additional gamma correction) does to the RW2 test image when maximum manual barrel Distortion correction. Download the Original image and display in an image-viewer at 20% magnification (which will collapse 5x5 pixel arrays into single display pixels). Note the 4 peripheral patterns (visible at 20%).

DxO Optics Pro 7.23 - Maximum Barrel Distortion Correction - View Original at 20%

Something rather different in nature is going on when DxO performs barrel distortion corrections ???

DM ...

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