RAF to DNG not showing correctly in Apple software

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  • Problem
  • Updated 5 years ago
  • (Edited)
RAF to DNG conversion works in Lightroom but in OSX Finder and Preview and all other Mac apps the resulting DNG displays as a large black rectangle with noise. The files may be edited in Lightroom and exported as TIF, JPG, etc. Affected cameras: Fujifilm S9100 and S100fs.

No problem with DNGs produced from Pentax *istDS.
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Barry Levine

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  • sad

Posted 5 years ago

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Rob Cole

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At the risk of stating the obvious, your Mac software is not liking those Adobe-converted DNGs (I suspect the conversion worked just fine, but I theorize that there is a compatibility issue). I suggest either:

* Upgrade your Mac software (DNG displaying "codec" stuff), or
* Downgrade your DNG conversion (use 1.3 version of DNG if possible, or 1.1 if necessary).

Adobe started creating v1.4 DNGs by default a couple years ago, but didn't publish the spec for those until a loooong while later, and so lots of softwares have been broken until catch-up, which is still going on...

Note: Adobe has STILL not updated the DNG Converter command line documentation (after X years since new parameter options added) - really gripes me.

R
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Chris Cox

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MacOS can only read DNG for cameras that it already knows about (and no, we don't know why).
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Barry Levine

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So the entire concept of DNG being the "universal" format is a lie. Either the raw file is converted to DNG...or it isn't. Saying the resulting DNG is different depending on the camera is ludicrous or, if true, flies in the face of everything Adobe claims about the format.

It's not a "Fuji DNG" or a "Canon DNG" or a "Nikon" DNG; it's a DNG crafted by Adobe using Adobe's software and Lightroom -does- recognize and convert my Fuji S9100 and S100fs files into DNGs that it can then edit in Lightroom and, if desired, export as JPG (or whatever) successfully,

I must lay the blame for this directly at the doorstep of Adobe. If a Canon CR2 file may be converted to DNG and display properly in the OSX Finder and Preview app, then a Fuji RAF file (that Lightroom supports!) should, as well.
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Rob Cole

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I can't help but wonder if Apple's doorstep shouldn't be darkened with part of the blame.
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Chris Cox

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DNG is a universal format, but for some unknown reason Apple's implementation ignores that and only supports specific cameras that they already know about. There's no reason for that, since the DNG file contains all the information needed to read the file, but for some bizarre reason that is what Apple does.

So, perhaps you should ask Apple why they have a restrictive and incomplete implementation of DNG?
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Rob Cole

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My guess: they're still pissed over the Flash/iOS thing ;-}.
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Barry Levine

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"Apple's implementation"? Adobe invented this. Adobe uses it for Lightroom. Adobe did the conversion. Why is there not a DNG codec for Macintosh distributed by Adobe? They do make one for Windows (and it does permit the RAF-converted-to-DNGs from the Mac version of Lightroom to be viewed in Windows Explorer and the picture viewer app). If they did not produce such a codec should I then be pissed at Microsoft for not cleaning up after Adobe's lack of attention?

Frankly, a DNG codec for OSX would resolvprobably e everything and Adobe could port over the Windows code in a short time.
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Chris Cox

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No, Apple failed to read the DNG file correctly.
Adobe did their part correctly, but Apple did not implement their DNG reading correctly.
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Barry Levine

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...and I will take Apple to task, as well. Aperture displays a preview of both the .RAF and .DNG files during the import process yet, once you click on the file in filmstrip, it changes to an exclamation point in a yellow triangle and advises you that it can't read the file. So it -can- see the file initially (and my RAF files do -not- have an embedded JPG).

This is just a cluster-$&%# by both companies.
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Chris Cox

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No, again, Adobe did their part correctly.
You're just seeing that Apple failed to implement DNG reading correctly.
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Nancy Armstrong

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I have been having the same problem, some dng files show the thumbnail in finder and some do not. It's a royal pain. And it seems to be totally random, although they are consistent within folders--I.e., if one dng file in a folder has no thumbnail then none do. Next folder might be perfectly fine with all thumbnails showing.
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Chris Cox

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Please let Apple know about this - they've had more than a few problems with thumbnails lately.
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Nancy Armstrong

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I will do that. I did actually figure out that it's not random even though it seemed like it. My photos from my Canon camera show up as thumbnails; my photos from my Sony camera do not.