Focal Length in Exif Information
MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Mon, 2005-04-25 17:46 |
Gallery 1.4.4pl4 displays in photo properties: E.g.: Focal length : 77.0mm (35mm equivalent: 319mm) This is incorrect. The focal length of the lens was 77.0mm. Is this a setting somewhere? Complete photo properties are: File size : 169236 bytes |
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Tim_j
Joined: 2002-08-15
Posts: 6818 |
Posted: Mon, 2005-04-25 18:02 |
Hello, Gallery just get the data. Regards, Jens |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Mon, 2005-04-25 18:25 |
Tim_j wrote:
Hello, Hi Jens, The calculation from the lens focal lenght (FL) to the 35mm equivalent must be based on the chip size: thus model / make. 50mm FL on a Canon 300D has a crop factor of 1.6, thus the 35mm equivalent is 80mm The Exif version 2.2 holds only one value. The 35mm equivalent is calulated somewhere on the server. This piece of software assumes that I have a compact camera because of the wide angle. With some other photo it says: Is there a setting somewhere? Thanks again. |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Tue, 2005-04-26 17:47 |
MacWilliam wrote:
Gallery 1.4.4pl4 displays in photo properties: |
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h0bbel
Joined: 2002-07-28
Posts: 13451 |
Posted: Tue, 2005-04-26 18:00 |
Well, the only way of fixing that is to edit the exif info in the actual photo. Thats where Gallery gets the info from. |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Tue, 2005-04-26 18:09 |
h0bbel wrote:
Well, the only way of fixing that is to edit the exif info in the actual photo. Thats where Gallery gets the info from. Thanks for you reply. Any idea what I can do about it, because the info about the 35mm equivalent is incorrect. |
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h0bbel
Joined: 2002-07-28
Posts: 13451 |
Posted: Tue, 2005-04-26 18:18 |
MacWilliam, Gallery does no conversion of any of the exif data. Thats up to the binary file that extracts it from the picture. If you run Gallery 1.5, it also supports exiftools as well as jhead. Perhaps give that a try? Gallery relies on whatever info the toolkit provides, so there is nothing we can do about what data is returned. If jhead is indeed reporting the wrong data, you should file a bug report with the jhead developer. |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Tue, 2005-04-26 18:37 |
Thanks H0bbel, I'm using Gallery 1.4.4pl4. |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Tue, 2005-04-26 18:56 |
MacWilliam wrote:
Thanks H0bbel, This is what Jhead says about it: OK, now I know where it is .... just have to find a solution ... |
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h0bbel
Joined: 2002-07-28
Posts: 13451 |
Posted: Tue, 2005-04-26 20:46 |
There we go, nothing anyone can _really_ do about it, it seems. |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Wed, 2005-04-27 18:27 |
H0bbel. I guess this will be the case for every 350D ... According to the maker of Jhead (Matthias Wandel) there is no way to solve this in Jhead. Is there a way that I can manipulate which information is shown in "photo properties" and thus remove the 35mm equivalent. |
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h0bbel
Joined: 2002-07-28
Posts: 13451 |
Posted: Wed, 2005-04-27 20:16 |
MacWilliam, I'm sure that there are ways to manipulate the data when it's entered into the Gallery cache. I suggest you ask in the customizations forum, hopefully someone there can help you out. Did you try to use exiftools instead? Does it generate the same result? |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Thu, 2005-04-28 18:41 |
Hi H0bbel, I'm new in Gallery and servers (just a simple Mac user). Some hints would be very much appreciated. |
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h0bbel
Joined: 2002-07-28
Posts: 13451 |
Posted: Thu, 2005-04-28 19:19 |
My bad, it's exiftags ( http://johnst.org/sw/exiftags/ ) |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Thu, 2005-04-28 19:28 |
Hi H0bbel, Thanks. I've downloaded this "exiftags-1.00.tar.gz" and it contains a folder loaded with documents. It isn't just a binary which I can put in my \bin folder. I've read the included "read me" but it's not clear to me how to get this working. Some hints on how to proceed would be very much appreciated. |
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Jordan_01002
Joined: 2005-02-14
Posts: 1535 |
Posted: Thu, 2005-04-28 19:42 |
Download the tarball (note the correct usage this time, h0bbel... :P) and extract it using It oughta stick the new files (exiftags, exifcom, exiftime) into /usr/local/bin (at least, that's where they went in my distro). |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Thu, 2005-04-28 19:58 |
Thanks H0bbel for your help. Although the Mac OS X system is running BSD and I've got a terminal console on it, I have no clue about Unix. I can always ask the hosting webmaster to do this for me ... |
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h0bbel
Joined: 2002-07-28
Posts: 13451 |
Posted: Thu, 2005-04-28 20:09 |
MacWilliam, I used the rpm files, so I don't know how to compile it. Not on OSX. http://exiftags.darwinports.com/ looks like there is a version available though. |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Thu, 2005-04-28 20:18 |
Thanks again. The rpm files open Realplayer with me ;-) Yep, it describes how to install it on my Mac. I've entered a question in the Apple Discussions Forum on how to get shell acces from my Mac on the webserver. This is what I need I guess. |
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h0bbel
Joined: 2002-07-28
Posts: 13451 |
Posted: Thu, 2005-04-28 21:02 |
I asumed you ran it on a max, since you mentioned it. If not, ask your host if they can install it for you, as it doesn't seem like there are any precompiled, static, binaries of exiftags available. |
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MacWilliam
Joined: 2005-04-16
Posts: 33 |
Posted: Thu, 2005-04-28 21:11 |
Thanks ! |
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