Searching for a field with crop

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[Originally posted by linuxuser on 2009-06-12 23:03:45-07]

I am searching for an _own_ field, maybe xmp, but not something like one of the comment fields and I don't care where, to put in a value like. "1.52". I try to explain, what this value is for. Assume you took a shot with a focal length of 100mm with a given resolution. Then I crop the photo by cutting of the border. The result would be the same as the photo has been taken with 100*1,52=152mm  and original resolution. (of course the resolution is now smaller because of the crop, it is a theoretical value). I have found xmp-fields like CropBottom, but no field which fits for this. I would like to use existing fields, not an own xmp-field. Any ideas? I nead this field for a query later.

[Archive]

[Originally posted by exiftool on 2009-06-12 23:57:54-07]

I would calculate the new EXIF FocalLengthIn35mmFormat and write
the appropriate value for this tag.

But if you want to store the cropfactor value directly, you could
easily create a user-defined XMP tag to do just that.  See the
config file for examples.  Or if you want to steal an existing tag,
maybe something like XMP:Rating?

- Phil

[Archive]

[Originally posted by linuxuser on 2009-06-16 09:40:43-07]

Thanks Phil! Is there anywhere a field for "digital zoom"?

[Archive]

[Originally posted by exiftool on 2009-06-16 10:51:06-07]

There is a DigitalZoomRatio tag in EXIF and XMP.