How to delete all exif of DNG?

[Guest]

I have digitized film negatives and converted the raw files to DNG. Now I want remove all metadata of those files. And put the film camera model to metadata. Is there anyway to delete exif?

[gary_sc]

I have not used this, but it seems pretty straightforward. Plus, you can do this in bulk

https://apps.apple.com/app/id784466108

This leads you to both a Mac and a PC version

[Guest]

Exif Purge doesn't support DNG files. Only JPEG.

[Stephen Marsh]

Or one can use ExifTool, which supports a wide range of file formats and metadata properties - including read/write for DNG:

https://exiftool.org/#supported

For only EXIF (camera) related data:

exiftool -exif:all= 'path to/file/or folder'

For all metadata, but not the ICC profile:

exiftool -all= -CommonIFD0= --icc_profile:all 'path to/file/or folder'

Note: Windows OS would use " double straight quotes. These commands will dupe the input file and rename the original file as a backup. To overwrite the originals without a backup, add the following argument with the others:

-overwrite_original

Note: Always work on copies while you are learning!

[Guest]

I have no any idea how to use Exif Tool... I dont understand those commands. Is there any graphical softwares?

[gregreser]

Try jExifToolGUI https://hvdwolf.github.io/jExifToolGUI/

You can edit the camera information directly in a single file or a batch of files.

[Stephen Marsh]

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@Deleted User wrote:

I have no any idea how to use Exif Tool... I dont understand those commands. Is there any graphical softwares?

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That is why there are tutorials that can be found via a search.

All you need to do is install ExifTool on the Mac or PC.

Then launch a command window – Terminal.app on Mac or CMD.exe on Windows.

Paste in the code without the path to the file/s or folder, ensuring a space separator at the end...

Then drag in the file/s or folder into the command window and press return/enter.

Screenshot:

There are various GUI's, but even then, for many use cases one has to enter the code anyway as not all features are offered in the GUI, so all they end up doing is providing a crutch for selecting files.

[Guest]

Thanks. I found this: https://exiftool.org/dummies.html

Now I found way to put correct metadata to my DNG negatives.
1. "exiftool -all=" (clear all metadata)
2. "exiftool -make=Canon" (put real camera producer name)
3. "exiftool -model=AE-1" (put real camera model)
4. "exiftool -ISO=400" (ISO)

5. "exiftool -shutterspeedvalue=1/250" (Shutter speed)
6. "exiftool -fnumber=8" (F-number)
7. "exiftool -LensMake=Sigma"