The same images went wonky in all attempts, while the others were safe throughout. ![]() The top row is the successfully imported images (still trying to figure out how this worked versus the other two attempts), the second the first attempt with DNG Converter 8.7.1 (I think), and the third another attempt after updating to DNG Converter 9.8.0. The following images illustrate the situation. Unlike before, it was only some (roughly half, but not every other) of the 40 that were affected and not every photo in the range. We were happily moving forward using the converted DNGs, until a subset of a batch of 40 DNGs showed the same issue as NEFs the other day. The toggle to embed the original raw file in both Lightroom and the DNG Converter has been tried both on and off with no difference.Up until the other day, it would always be a range of photos, either during generation of the Lightroom histogram or when a Finder preview is generated (Command-I) in Mac OS.Our workaround involved never importing the photos to Lightroom in Nikon's raw format (NEF) and keeping everything in DNG or JPEG format.Photos imported to Lightroom as NEFs without being converted would import fine, then show a rainbow-like skewing of the colour channels when the histogram was generated and displayed in the top-right corner of the Library module.JPEGs have never caused any issue, and neither have NEFs converted to DNGs via Lightroom.Photos are typically imported using a USB card reader using Lightroom's import feature and the copy/copy as DNG options.The Adobe DNG (Digital Negative) Converter has been updated to the latest version (9.8.0.692).A trial version of Lightroom 5 did not solve the problem, so an updated Camera Raw version does not seem to be the solution.According to this, the Nikon D7100 NEF (Nikon Electronic Format) files are read by Camera Raw 7.4, the version bundled with Lightroom 4.4: Cameras supported by Camera Raw.The camera is a Nikon D7100 with its firmware updated to the latest version (1.03). ![]()
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