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Metadata / Re: Nikon Z6/Z7 lens focus distance
« Last post by Phil Harvey on Today at 07:26:12 AM »
If you send me a series of about 7 pictures shot with manual exposure and a range of known focus distances, I'll take a look to see what I can find.  Shoot the pictures at the lowest JPEG size/resolution to keep the size down.  My email is phil at owl.phy.queenus.ca

- Phil
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Thanks for the follow up Phil.

My goal is not really to change the ctime of the target files, but to do some processing on files that are newer (in the target folder) or that have been modified, since a specific date (see the modtime variable). So, based on your answer, I guess that I will have to loof for a workaround, maybe with the find command...

Thanks again.

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Metadata / Re: Reasons not to use three letter country code?
« Last post by obetz on Today at 04:13:42 AM »
I put 2 letter codes in my photos.  GB for UK, you know it makes sense!

Correct, UK is not a ISO 3166-1 country code but just reserved. Easy to confuse with the tld.

Oliver
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Metadata / Nikon Z6/Z7 lens focus distance
« Last post by jcharmon on August 22, 2019, 07:34:37 PM »
Regarding prior discussions about Nikon Z6/Z7 lens focus distance,  http://u88.n24.queensu.ca/exiftool/forum/index.php/topic,9931.msg51662.html#msg51662 and Phil's reply http://u88.n24.queensu.ca/exiftool/forum/index.php/topic,9931.msg51665.html#msg51665, some of us have found that Nikon FX lenses record focus distance and other data in the Nikon Lensdata0800 tag group https://sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html#LensData0800.

However, lens focus distance isn't being reported by ExifTool for native Z lenses (e.g., 24-70 f4 S) although other lens tag group metadata for this lens are. Is it possible that this information could still be hidden somewhere in Nikon maker notes? If there a way that Nikon Z users could assist in discovery? (Even though I recognize that this data may not be very accurate.)
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Developers / Re: Translation of tags into Russian
« Last post by Phil Harvey on August 22, 2019, 03:59:46 PM »
Nobody has suggested changing these until now, and changing them now could break many scripts/apps that rely on the current behaviour.

- Phil

P.S. Try running the command again with the -n option to avoid any rounding by ExifTool
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Hi Marco,

As far as I know, there is effectively no way to change ctime in Perl, other than setting it to the current time by moving the file.

- Phil
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Metadata / Re: Reasons not to use three letter country code?
« Last post by Alan Clifford on August 22, 2019, 02:47:16 PM »
I put 2 letter codes in my photos.  GB for UK, you know it makes sense!
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Hi,

In one of my scripts, I'm using exiftool with the filemodifydate value, which, if I'm not mistaken, refers to the mtime of the file (i.e. modification of the file content, to put it short).

Now, I would like to refer to the ctime, i.e. the status change time.

My goal is to target every new file (so not just modified file) in the folder. Let me know if I'm wrong, but to my understanding (and my lectures/experimentation), moving a file in a folder does not modify its mtime, but will modify its ctime (probably not necessary, but see here for difference between atime, mtime and ctime: https://linuxhandbook.com/file-timestamps/)

Any idea on how I could do this with exiftool?

Here's the relevant part of my script:

modtime2="\$filemodifydate ge \"${modtime1}\""
exiftool -P -p '$directory/$filename' -ext xmp -if "${modtime2}" -r $IMAGESDIR > $BASEDIR/output.txt

Thanks for any help.

Marco
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Developers / Re: Translation of tags into Russian
« Last post by IWTA on August 22, 2019, 01:27:43 PM »
These values ​​can be said to look rounded:
Quote
Exposure Time: 1/800
AE Exposure Time: 1/744
And you can even say for sure that the value 1/744 is rounded to this value - 1/800.
But what value is rounded in case:
Quote
F Number: 5.6
AE Aperture: 5.7
Both of these values ​​do not look rounded.


If you leave the tag names “Shutter Speed” and “Aperture” in the “Composite” section unchanged, this will only confuse.
You yourself wrote about this:
Quote
If tags have the same name, then the meaning should be the same.
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Developers / Re: Translation of tags into Russian
« Last post by Phil Harvey on August 22, 2019, 01:04:50 PM »
Do the values ​​of these fields look rounded?

Yes.

- Phil
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