How to write exif data into VueScan files?

[GL]

Hi,

I need some basic information about writing exif data into VueScan files like TIFF, TIFF-RAW and DNG-RAW with ExifToolGUI.

Q1:
How can I write the following exif data into VueScan files (TIFF, TIFF-RAW and DNG-RAW)?
   film manufacturer (Fujichrome)
   film type (Velvia 50)
   film code (RVP50)
   film speed (ISO50/18°)
   emulsion (425678)
   date taken
   camera
   focal lenghth
   aperture
   shutter speed
   exposure compensation
   distance
   filter
   tripod

Q2:
Is there any danger to damage the image data in VueScan files (TIFF, TIFF-RAW and DNG-RAW) by writing exif data into these files?
   
Thanks for help

[BogdanH]

Hi,
To answer the second question first: no, there's no danger to damage image data by writing/changing image metadata.

When you start GUI, some "important" tags are allready listed in Workspace of Metadata panel and as you can see, many of tags you've specified are covered:
DateTimeOriginal (date taken), CreateDate (date scanned),
Make and Model (camera),
FocalLength, FNumber, ExposureTime, ISO, etc.
..and are ready to be populated.

To do that (change/insert metadata), you first select files you wish to modify in Filelist panel and then:
-select desired tag (i.e. Make) in Workspace and press Enter
-edit field at the bottom of Workspace will become yellow and you write value there, i.e. Canon
-when done, press Enter and the tag you've just changed becomes yellow.
-now choose another tag, i.e. ISO, and press Enter to change it... repeat above until all desired tags are populated.
-when done with populating values, click on Save button at the bottom of Workspace panel and that's it.

You will notice, some tags you need (i.e. exposure compensation tag) aren't shown in Workspace, so you must add them. However, before you can do that, you must know the name of the tag you wish to add. See "How to add tags into Workspace" here: https://exiftool.org/gui/scr/etgui_scr01.htm

You can find tag names here: http://www.exiftool.org/TagNames/EXIF.html
and here: http://www.exiftool.org/TagNames/XMP.html

Once tag is added into Workspace, it's value can be modified as described above (btw. tag for exposure compensation is exif:ExposureCompensation).

The problem is, tags for film (descriptions), tripod use and similar, don't exist. So, the only solution I can think of is, you write those values into some "universal" tag, i.e. exif:UserComment. Second option is, you define your own "user defined" tags inside Xmp section -which requires some advanced knowledge of ExifTool use.
Anyway I suggest you populate existing (standardized) tags first. By doing this, your skill (and metadata knowledge) will improve... And before everything, take a look here: https://exiftool.org/gui/articles/where_what.html

Bogdan