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How Adobe DNG format saved me

3/30/2016

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From mid-February into March I spent 4 weeks in San Francisco. I hauled a bunch of camera gear not knowing what I would need since we had no definite plans or itinerary. I had my very old MacBook laptop. It’s so old it cannot run any version of Lightroom beyond 4. This seemed to be sufficient just to review images and do minor edits while I was there rather than save it all for when I returned. I had both cameras and did in fact occasionally carry both so I could have a wide-angle zoom lens and a long zoom lens at the ready. After the first couple days it was time to see what was captured. I opened Lightroom and used my USB SD card reader for upload. Imagine my surprise when Lightroom told me it couldn’t read the files! Sony ARW (their version of RAW) should be the same no matter what camera was used right? Wrong. Version 4 of Lightroom did not have the upgrade for the 77M2 so it would not read the RAW files from that camera. Yikes! What to do? My husband and I put our heads together and came up with the solution. His MacBook is newer and runs Lightroom 5 which does have the 77M2 camera update. We uploaded the files to his computer converting them to Adobe DNG files in the process. Then via WiFi I pulled them onto my laptop; time consuming but effective. Lightroom 4 was perfectly happy with the DNG files now. Fortunately, there was no problem with files from the A57, the older camera. Relieved of the problem, I continued to use the 77M2 as my primary since it’s a better camera.
 
If you are not familiar with Adobe’s DNG file format DNG stands for Digital Negative. It is supposed to be lossless and I’ve seen no reason not to believe this as far as processing is concerned. Adobe says this about creating the universal format: “By addressing the lack of an open standard for the raw files created by individual camera models, DNG helps ensure that photographers will be able to access their files in the future.” More about DNG is found at Adobe’s help site:
 https://helpx.adobe.com/photoshop/digital-negative.html
And a review is here: https://photographylife.com/dng-vs-raw
Google “Adobe DNG” for much more than you ever want to know.
 
Anyway, DNG saved a troublesome situation for me.
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    Maryann Flick

    President, Coastal Camera Club

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