My google-fu might have failed me... but DNG is a pretty standard file format now – how can I hit spacebar in Finder and see a preview of these images? They're industry-standard Adobe DNG's - nothing special or weird about them.
So I guess Leica uses .DNG file name for their .RAW files? Makes sense, and DNG's are "Digital Negative" files... My Finder will preview my Sony .ARW camera raw, my old Canon .CR2 raw, will NOT open Nikon .NEF files... and of course will not open Adobe .DNG's....From what I've read, can be hit and miss, depending on camera, tools used, workflow.
Was able to QuickLook a Leica DNG file I found on the interwebs. Latest Ventura.
DNG "format" is a container - so much depends on what is inside.So I guess Leica uses .DNG file name for their .RAW files? Makes sense, and DNG's are "Digital Negative" files...
Adobe DNG is a standard available to anyone, but how it is used may not be part of the standard.So this is literally Apple screwing INDUSTRY STANDARDS...
Can you give a description of one that can't be previewed? Even better a link to an example.so how does one add a file format to be previewed?
Inside are simple, normal, garden variety JPG's (which I'm doing some camera raw stuff to after -haven't touched them yet- so wanted them in a digital negative format which works well for my workflow). Finder can of course preview the JPG's outside of the DNG container, just not once it's inside.DNG "format" is a container - so much depends on what is inside.
On my Mac, Preview and Quicklook are able to display most DNG files, but not all. I only have about 1000 DNG files, and the few which can't are RAWs from open source non-Canon software in a non-raw Canon Powershot S3 IS. But all are readable by Graphic Converter, Affinity Photo or Photoshop (but not PixelmatorPro)
Not deliberately. Apple does not include all formats which might be inside DNGs. For cameras RAWs packaged as DNG, Apple may be deliberately leaving it to camera manufacturers to provide the necessary. In some case there may be legal reasons - e.g. the camera manufacturer only makes format available to purchasers of their cameras.
Can you give a description of one that can't be previewed? Even better a link to an example.
I can open it in Adobe Camera Raw and then Photoshop. Graphic Converter says "The TIFF internal directory is corrupt; the file cannot be opened."; but does show me a thumbnail. So I am not surprised Preview fails.Here's a link to one: https://www.mediafire.com/view/ehet9tvx7qjnq5m/IMG_2032.dng/file
Thanks for looking! And no, these are as common as they get - old JPG's from probably the best-selling point-and-shoot camera product line ever, Canon PowerShot. To make them into DNG's I use either Adobe Bridge or Adobe Lightroom Classic "export to DNG" - also super industry standard.I can open it in Adobe Camera Raw and then Photoshop. Graphic Converter says "The TIFF internal directory is corrupt; the file cannot be opened."; but does show me a thumbnail. So I am not surprised Preview fails.
So I am guessing there is something non-standard (or at least uncommon) inside the DNG. Am I right in understanding that you have constructed the DNG? File Info says it is from a Canon PowerShot SD500, but I assume that is just from the JPG inside the DNG files.
I can reproduce what you are seeing. When I use Lightroom to export as DNG with input files either PowerShot jpeg or CanoScan tiff. The DNG can't be opened with Preview, but can with Affinity.And no, these are as common as they get - old JPG's from probably the best-selling point-and-shoot camera product line ever, Canon PowerShot. To make them into DNG's I use either Adobe Bridge or Adobe Lightroom Classic "export to DNG" - also super industry standard.
Thank you for testing. And yeah, it seems to be pretty willy-nilly what it will actually preview... just makes it annoying that I have to physically open up a file in Photoshop to see what it is - kills my productivity at times when I'm dealing with a lot of these.I can reproduce what you are seeing. When I use Lightroom to export as DNG with input files either PowerShot jpeg or CanoScan tiff. The DNG can't be opened with Preview, but can with Affinity.
Adobe Bridge and Lightroom allow converting of anything (I think) – at least JPGs, to .DNG. I use it for lossless editing of OLD JPG-only camera files (on cameras which didn't even have a RAW output option), via Camera RAW (a la Lightroom Classic 'develop').I note that Adobe DNG Converter refuses to attempt JPEG to DNG.
I don't know enough about the DNG format as to what is allowed inside an DNG. I can see the logic of not converting JPEG to DNG, because DNG is intended for RAW formats and it is somewhat meaningless to convert a JPEG to a RAW format.