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Subject: Re: Compressed DNG is larger than original RAW file!



A "full size JPEG preview" is non-trival in size. ".CR2" files do not contain full size JPEG previews. If you don't want your ".DNG" files to be bigger than the ".CR2" files, then DON'T embed the full size JPEG preview.

Why don't you try turning off the option to embed full size JPEG previews and then compare the file sizes?

[".CR2" and ".DNG" files both use the same lossless JPEG compression algorithm, so the files should be fairly close when the embedded preview sizes are similar.]

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