Translation of tags into Russian

[IWTA]

And the usage of tags can change over time, see the EXIF "destination" coordinates being "repurposed" by MWG or whom?

The section 5.8 Location (MWG - Guidelines For Handling Image Metadata. Version 2.0 - 2010.pdf) has explanations about this.

[StarGeek]

For what it's worth, there's a copy of the PDF attached to this post.

[IWTA]

For what it's worth, there's a copy of the PDF attached to this post.

File deletion.

[StarGeek]

I just double checked.  It downloaded fine.

[IWTA]

I just double checked.  It downloaded fine.

I just wanted to say that I deleted the file from my post. 

[obetz]

And the usage of tags can change over time, see the EXIF "destination" coordinates being "repurposed" by MWG or whom?

The section 5.8 Location (MWG - Guidelines For Handling Image Metadata. Version 2.0 - 2010.pdf) has explanations about this.

I know what MWG writes today, but that's not the original purpose of the EXIF standard.

That's what I meant by "usage of tags can change over time".

[IWTA]

Please explain to me why tags with the same name (from different sections) have different meanings?
Why do the same values ​​have different tag names?
Or I don't understand something, or there are incorrect tag names.
Examples are taken from one photo:

---- EXIF ----
ISO: 16000
Recommended Exposure Index: 16000
---- MakerNotes ----
Base ISO: 16600
ISO: 16600
---- Composite ----
ISO: 16600

---- EXIF ----
Exposure Time: 1/320
Shutter Speed Value: 1/332
---- MakerNotes ----
Camera ISO: Auto
Target Exposure Time: 1/323
Exposure Time: 1/304
Exposure Time: 1/332
---- Composite ----
Shutter Speed: 1/320

---- EXIF ----
F Number: 13.0
Aperture Value: 12.9
---- MakerNotes ----
Target Aperture: 13
F Number: 13
F Number: 13
---- Composite ----
Aperture: 13.0

[Phil Harvey]

If tags have the same name, then the meaning should be the same.

We can only guess at the exact meanings of the MakerNotes tags.

I have no justification for the difference between FNumber/Aperture and ExposureTime/ShutterSpeed, but different standards use different terminology sometimes.

- Phil

[IWTA]

Phil
1) Where do the data for tags from the "Composite" section come from? Are these duplicate tags from other sections?

2) When I import a translation from an .xml file, for some reason, I don't get a message about different translations for the tags of the same name.
Can this be somehow written in the import.pl file?

[Phil Harvey]

Where do the data for tags from the "Composite" section come from? Are these duplicate tags from other sections?

Yes.

When I import a translation from an .xml file, for some reason, I don't get a message about different translations for the tags of the same name.

I don't understand how this could happen.

Can this be somehow written in the import.pl file?

No.

- Phil

[IWTA]

I downloaded a lot of RAW files for different cameras from different manufacturers in order to reveal the pattern of using terminology by different camera manufacturers for:
"Exposure Time", "Shutter Speed", "Target Exposure Time"
"F Number", "Aperture Value", "Target Aperture"
"ISO", "Base ISO", "Speed ISO".

So far, only this has learned that:
"Exposure Time", "F Number", "ISO" - these are the parameters that we ourselves set in the camera settings. The values of these fields always match the camera settings. This is their distinguishing feature.
"Shutter Speed", "Aperture Value", "Base ISO" are the actual values that were used when shooting. They may slightly differ from the parameters set by the photographer on the camera if we specify exposure compensation when shooting or use the automatic exposure mode.

[IWTA]

Hi Phil!
I compared the values ​​of the tags "Exposure Time", "Shutter Speed", "F Number", "Aperture" of RAW photos from different camera manufacturers and revealed a regularity.
Either the "Shutter Speed" and "Aperture" tags are given names incorrectly in the "Composite" section, or the values ​​for these tags for the "Composite" section are taken from the wrong fields. It needs to be fixed.

If there is an error in the names, then in the "Composite" section you need to rename the tags:
"Shutter Speed" => "Exposure Time"
"Aperture" => "F Number"

[Phil Harvey]

But Shutter Speed and Exposure Time are two different names for the same thing.

The same for Aperture and F Number (since Aperture is reported as an F Number).

- Phil

[IWTA]

I also thought so before, but there is a difference between them.

"Exposure Time" and "F Number" are the values ​​that we manually set in the camera settings, or the camera does this in automatic mode.
"Shutter Speed" and "Aperture" are the real values ​​that were used when shooting.
In most cases, the values ​​of these fields are the same, but if we specify exposure compensation, or we use fully automatic mode, then the values ​​for these fields will be close, but will not coincide.

A similar situation is with ISO tags, but it will be harder to find out.
Where do the values ​​for the ISO tag from the "Composite" section come from?

[Phil Harvey]

The exposure compensation should have no effect on these reported values.  Have you read FAQ 4?

See the Composite Tags documentation for a list of tags from which the Composite tags are derived.

- Phil