Focal length missing from EXIF

I'm having this problem in version 3 and 4. I have a Canon 40D and all of my photos that I've editing in LR (not cropped) are missing the focal length in the EXIF data.
This does not happen with Canon DPP. LR will see the focal length in the library view, but when it's converted to JPG and then viewed in ZoomBrowser or whatever program that piece of data is missing.
Windows 7 SP1 x64, LR x64, "Minimized embded data" is unchecked as well.
Am I doing something wrong?

Photog1982 wrote:
I'm having this problem in version 3 and 4. I have a Canon 40D and all of my photos that I've editing in LR (not cropped) are missing the focal length in the EXIF data.
This does not happen with Canon DPP. LR will see the focal length in the library view, but when it's converted to JPG and then viewed in ZoomBrowser or whatever program that piece of data is missing.
I can see what you noticed for a JPG exported from a CR2 originating from a 5D Mk II. BUT:
The focal length is present in the Exif tag, but Canon's ZoomBrowser or DPP will not show it. Try to use Windows Photo Viewer and check the properties, you'll see the focal length there (like in other programs like IrfanView, ExifTool, etc.). Even subject distance (which is no longer shown in LR3.6 or 4.0) is included in the JPEG's Exif.
Beat

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Regards, JML

Thanks Colin, I will try it.
Sounds like it may work - however bit awkward solution in otherwise ergonomic LR environment :-(
I really do not understand why this value is not among the filtering metadata when LR recognizes it and shows it on every corner. Especially considering the fact LR is supposed to be full WF solution and certain development settings cannot be effectively applied without selecting images only with certain focal length values.
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b Does anyone have an idea if Adobe plans to eventually implement this feature?
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Feature Request - better croping, focus patterns,focal length selections?

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There is a corresponding idea at the feedback forum: http://feedback.photoshop.com/photoshop_family/topics/add_image_direction_in_map_module
Anyone who wants this feature should also vote over there...
BTW: +1
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Library Filter: Metadata Browser: Add Focal Length

Please add Focal length as an available Meta data to browse in the Library Filter.
Purpose:
I'm currently considering to buy a new zoom lens. To determine the best zoom range for the lens, I like to see which focal length I use most often by profiling my existing images.
The information is already available in the images exif data, it only needs to be exposed in the Lib Filter.
Reinhard

A few posts before yours:
http://www.adobeforums.com/webx?128@@.3bc46ae7
...and dozens of others can be found if you had taken the time to look.

How to shoot fixed focal length lenses?

Hi,
I wonder how I am supposed to best shoot fixed focal length lenses.
Currently I just shoot one set of 9 images, just because it is a fixed focal length lens and if I want it to be good, I shoot the same set again with different apertures.
But the documentation says: "For prime lenses, shoot at (1 × minimum focus distance) and (5 × minimum focus distance) focus distance positions with a fixed f/11 aperture."
My problem here is to understand how I am supposed to shoot with different focus distances while using a fixed focal length lens?
As far as I have understood until now, I have to put the test chart fully on the picture so it fills something about 1/2 to 1/3 of the picture, leaving room everywhere. I also input the type of chart I used in the software.
If I do this, then moving the camera to say 5 times the first distance makes the second set of picture agaisnt the rules since obviously the test chart will show only much to small.
If I do it the other way around (first 5x then 1x min) then the second set will only show fractions of the chart.
As added difficulty I wonder how to handle macro lenses... the minimum focus distance there usually allows for a 1:1 magnification. That would either require a test chart total size (!) of less than 1/2 an inch (fun printing) or you would only get to see a fraction of a test-chart-square.
So how do I do it?

No, I am not confunsing these terms. I thought of it exactly as you described, but that seems not in sync with reality or guidance given - for the following reasons:
1. I do actually own a 35mm macro lens with minimal focus distance which I want to create a profile for. Minimum focus distance is 13cm with magnification 1:1. The latter means that the picture is completely filled by any object that is as big as the sensor. --> The full test chart needs to be less than 2cm small.
In that regard your example of a 400mm lens is the easy thing because of the 12 feet distance. Anything is easy to shoot from 4m aways as you can use normal charts.
2. As I described the guide says that the chart should fill about 50% of the picture and you should use one chart. Even in your example obviously the size of the chart on the picture will vary in a real big way if you shoot the same chart with a 400mm lens from 12 feet and from 60 feet. I just wonder if that is what is correct or one should choose a different chart for each distance (I dont believe that).

Getting images w/ different zoom/focal lengths to match up?

Hi! I recently shot some star trails the other day with a 20 second shutter speed. i ended up with around 150 pictures but when i went to blend them, the trails didn't match up! i later discovered that when i went outside to clean off the lens (which was every 10 mins) that i accidentally zoomed in a little each time i cleaned it (ranging from 11mm to 13.6mm). I put all the images into photoshop and blended the ones that were shot with the same focal length (i ended up with 5 layers)I was wondering if there was a way/feature or if you guys knew any tips or tricks that would crop the image and line it up to match the other trails for me automatically or help me crop the images to the right size. Thank you and any help is much appreciated!! (:

Do your images have any easily identifiable landmarks in the foreground - buildings, trees, etc.? If so, you could use the Measure tool, and figure the necessary scaling from there.

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So I tried to open it using DXO and it returned :
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Right click the image and the File Info is missing from the menu.
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If you can determine the date for the zeros and it is fairly recent, then the system event log might list something as having occurred.
If there haven't been any viruses, then I'd say it was a transient condition, either in the circuit-boards or cabling or the hard-drive media, itself.
Has the computer ever locked up so you had to turn the power off to get control back of the mouse?
You can test the hard-drive media for errors by chkdsk d: /r or chkdsk d: /b (or the gui-scandisk equivalents) to scan for data errors--iffy media problems. Move any virtual-memory swapfile off that drive if you want to test it while the computer is running. Maybe do a plain chkdsk, first, one where you don't fix problems and don't test the media, which would find problems indicated with zeros in the directory-structure, first. And if you find any of those, disconnect your backup drive in case the "fixes" corrupt even more things and that gets replicated.
A chkdsk that fixes media problems will likely take several/many hours.

Focal length in Metadata panel

I notice that in the metadata (Info) panel one can see the focal length used and below that, a blank field for the 35mm focal length. Is there any way to get Aperture to fill in that empty field with the 35mm equivalent to the lens's actual focal length?

Thanks for that. I did as you suggested, but my current libary has only recent images all from one camera, which doesn't produce RAW fles, the Ricoh CX4. I will go back to an earlier library where I have several cameras involved included two whose raw files are processed by Aperture, and i'll bet I'll see the 35mm equivalent.
Is there any way I can tell Aperture the formula for my CX4 lens such as that its minimum focal length of 4.9mm is equivalent to 28mm on a 35mm camera?
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//Svien

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In a high speed workflow environment the work-around of filtering by date range and selecting meta data filters is not desirable.

Sort by focal length

1. Metadata Browser: sort by focal length (using a cushioned range)
2. Ability to filter based on focal length: i.e. with 3 criteria lens, focal length, aperture it would be super simple to paint in presets for removing natural vignetting.

Ian,
The post in which I repeated your comment was not directed at you, the quote was used to re-iterate that it is accepted that the feature is currently not available, and that the search feature is very limited.
If you feel my post was directed at you, my apologies. If you reread the post, the only two times the word "you" was used was in the following way:
>"If you build it, they will come..." well, "If the information is there, you should be able to search, filter, or create smart collections by it."
The comment should have started with "With all due respect to the LR team..." because I hate harping on a subject, with anyone. However, this thread was initiated on July 10, 2007 and covers an issue that deserves to have been addressed by now.
After all, LR is a database program designed with photographers in mind. All databases work in the same way:
1. They provide a way to input/gather information
2. They store the information in fields, and
3. They allow you to obtain that information through reports, or other means, so you can use it constructively. LR gathers the focal length information separately from the lens information. Therefore, it should be easy to program it to allow you to filter/search/create collections on the information.
Regards, JML

Focal length missing from EXIF

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