ARW 16 bit depth, after conversion with DNG Converter 13.1 gets 14 bit depth.

Forum|Forum|4 years ago
April 20, 2021
1 reply
2090 views

Hi again. I am on win10, Adobe DNG Converter 13.1

Need to convert the Uncompressed ARW (+80mb each) to non lossy DNG. File properties show original 16 bit depth, after conversion 14 bit depth.
This doesn't 'feel'right. Why is this happening? Any way to keep 16 bit after conversion?

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D Fosse

Community Expert

Sony raw files (.arw) are 14 bit natively. Under some circumstances 12 bit.

https://www.sony.com/electronics/support/articles/00229990

J

john_doedAuthor

Participating Frequently

Hi D Fosse, thnx for the url, interesting info.
Yet I look in Bridge 10 which metadate shows 16/ 14 bit as stated above.

https://i.ibb.co/Qbmh0YV/16.png
https://i.ibb.co/xqk1d0J/14.png

J

john_doedAuthor

Participating Frequently

Huh. That's crazy. You're right, .arw is reported as 16 bit, which is wrong. After DNG conversion, it's correctly reprted as 14 bit, which it was all along.

.arw left, same file converted to .dng right:

I think I need to look at those file sizes too...82 MB arw, and 49 MB dng? Why is the arw so big? I normally convert everything to dng in Lightroom import, so I hadn't noticed this.

Well D Fosse, I don't make things up.

OK so go with the Sony info, and take the Adobe info as wrong...?! A bit confusing and annoying. Can we consider that as a bug?

Yeah the uncompressed arw file is insanely big. The compressed one is more likely. But i prefer to have the pc using dng converter to recalculate the original arw instead of having the camera come up with a compressed arw.

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