It's not just the DG 15mm lens (below are 2 examples with the Panasonic 7-14mm f/4). The example below is representative for many images taken with the DG 15mm f/1.7 lens - whenever a person appears near the border of the image, the amount of distortion applied by Lightroom causes visible unnatural alterations (Iridient Developer for comparison): "Bad" raw converters (no choice, people look like Herman Munster): Adobe Lightroom (including 5.7.x), Silkypix (including 6 Pro). The "good" list includes Iridient Developer (below), DxO 10.0, Capture One 8, Photo Ninja (never applies lens correction), Raw Therapee (not tested myself). Many leading raw converters give users a choice whether to use the "correction", or turn it off: The image is cropped to mask "black" areas next to the image border that don't have any information after the transformation. This effect is intensified the further away from the center they appear (similar to a fisheye effect). To achieve "straight" lines, the shape of objects is distorted. Result: Loss of detail and sharpness, mostly in the corners.
Since mathematically the image is warped, some pixels are interpolated and others disappear (loss of actual information).
Most (all?) m43 cameras store lens correction information as part of their raw files to allow for software-based compensation.Īdobe Lightroom does not provide a choice whether to apply this information - it is always used. Some lenses (example below: Panasonic Leica DG Summilux 15mm f/1.7) have a heavy amount of distortion.
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