Luminous Landscape Forum
Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: spassig on April 20, 2019, 01:39:42 pm
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Hello
Does someone know a tool that show the focus distance in EXIF data for macOS?
Jochen
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Hello Jochen,
The EXIF tools by Phil Harvey - these are basically the standard tools with which you can also change EXIF data.
https://www.sno.phy.queensu.ca/~phil/exiftool/
The tag is for IQ3/IQ4 - SubjectDistance
Some older fully electronic Mamiya AF lenses (such as the 300mm F4.5) do not write Focus Distance to EXIF data.
Greeting Gerd
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Hello Peter
Thanks so lot.
I have download the tool for macOS X (10.13.6)
I have install it.
I see that ExifTool 11.37 must start in Terminal.
I open Terminal and carry out "ExifTool"
Someone happens and a lot of information comes, but I don't see the application?
Jochen
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Hello Jochen,
EXIF Tools is a very powerful CMD processor for different GUI and applications.
If you continue to scroll down the page - (https://www.sno.phy.queensu.ca/~phil/exiftool/) - you will see several applications for MAC or multiplatform for the EXIF tools. Also plugins for Phoshop or similar.
For example, EXIF Tools GUI for MAC https://hvdwolf.github.io/pyExifToolGUI/
CMD example:
exiftool -k -a -u -g1 -w txt filename.IIQ
Extracts all metadata from file filename.IIQ and writes them to a text file filename.txt in the same directory.
Greeting Gerd
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Thanks Gerd.
First remark.
I'm Photographer and not IT expert.;-)
Hello Jochen,
EXIF Tools is a very powerful CMD processor for different GUI and applications.
OK.
If you continue to scroll down the page - (https://www.sno.phy.queensu.ca/~phil/exiftool/) - you will see several applications for MAC or multiplatform for the EXIF tools. Also plugins for Phoshop or similar.
I see on page the application GraphicConverter.
I use this application. in which way can I use GraphicConverter and EXIFTools?
For example, EXIF Tools GUI for MAC https://hvdwolf.github.io/pyExifToolGUI/
I download pyExifToolGUI.
I install it in folder application.
When I start pyExifToolGUI some remarks come, see screenshot.
That is the end of my understanding.
CMD example:
exiftool -k -a -u -g1 -w txt filename.IIQ
Extracts all metadata from file filename.IIQ and writes them to a text file filename.txt in the same directory.
Must I put in this CMD in Terminal?
Jochen
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I download pyExifToolGUI.
I install it in folder application.
When I start pyExifToolGUI some remarks come, see screenshot.
That is the end of my understanding.
pyExifTool GUI findet die EXIF Tools nicht auf Deinem System - das ist schon alles. Du musst mal schauen ob man in der Applikation unter den Voreinstellungen sagen kann wo die EXIF Tools liegen. Die EXIF Tools sind praktisch die Basis Applikation die von den anderen Tools - im Hintergrund - verwendet wird. Dazu müssen die Tools wissen wo sie auf der Festplatte zu finden sind.
Must I put in this CMD in Terminal?
Ja, das musst Du im Terminal eingeben
exiftool -k -a -u -g1 -w txt Festplatte\Verzeichnisname\filename.IIQ dann bekommst Du eine formatierte Textdatei mit allen Metadaten der IQ RAW Datei.
Gruß Gerd
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Hallo Jochen,
gerade gefunden für MAC - ein Anleitung um Dein Problem zu fixen https://tonyredhead.com/google-tips/pyexiftool-exiftool-linking-issue
Ich denke damit kommst Du bestimmt klar...
Gruß Gerd
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@Gerd
Erst mal vielen Dank für Deine Unterstützung!!!
Ich werde mich mal in Deine letzten Antworten einlesen.
Noch schöne Ostern.
Jochen
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Hello Gerd.
The PO System don‘t write the focus distance in the EXIF.
PO confirmed that.
I check it with application GraphicConverter where I see different files from Sony A7 and PO XF.
So I don’t need the recommended application.
Jochen
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Thanks Jochen!
So Phase confirmed NO? I also thought it would be damn useful so I spent hours trying to make it work for my XF! Now I know it can't. Perhaps a Capture upgrade? I use the PCTS 120 Apo and CO monitors and reports all the lens movements which is brilliant, so surely Phase can easily add AF focal distance data to the metadata since camera's have to use it in order to focus properly.
But thank you for your insight!
Charles
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Hello Jochen,
for me, the value is definitely there. But I have current IQ4. Maybe it does not exist on IQ3 or older. I would have to browse my older RAW data when I'm back home.
Greeting Gerd
(https://up.picr.de/35610080bf.jpg)
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Hello Jochen,
for me, the value is definitely there. But I have current IQ4. Maybe it does not exist on IQ3 or older. I would have to browse my older RAW data when I'm back home.
Greeting Gerd
Hello Gerd
Did You check the distance in older RAWs from IQ3?
Jochen
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Hello Gerd
Did You check the distance in older RAWs from IQ3?
Jochen
Hello Jochen,
i'm sorry i forgot ....
I'll do it tonight.
Greeting Gerd
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Hello Jochen,
i'm sorry i forgot ....
I'll do it tonight.
Greeting Gerd
Hello Gerd
Thanks.
I have ask PO some days before for focus distance.
PO answer me IQ3 and IQ 4 cannot show the focus distance.
Can I send PO your posting that show focus distance?
Greeting
Jochen
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Hello Gerd
Thanks.
I have ask PO some days before for focus distance.
PO answer me IQ3 and IQ 4 cannot show the focus distance.
Can I send PO your posting that show focus distance?
Greeting
Jochen
Hello Jochen,
Surely you can do that ...
Greeting Gerd
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Have you checked whether it’s real? Or always the same distance?
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The 1.328m from my ScreenShot are correct. This was with IQ4 Archomatic, SK 35mm Br. LS on a distant edge of the forest (at ~ infinity). I have only noticed so far that with the SK 120mm Macro Br. LS - from time to time - is absolute nonsense in the subject distance.
As I said, I'll check the rest today later with IQ3 and different subject distance values.
Greeting Gerd
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The 1.328m from my ScreenShot are correct. This was with IQ4 Archomatic, SK 35mm Br. LS on a distant edge of the forest (at ~ infinity).
How could the distant edge of the forest (at ~ infinity) be 1.328m?
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How could the distant edge of the forest (at ~ infinity) be 1.328m?
1.328m = one thousand three hundred and twenty-eight?
Jochen
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1.328m = one thousand three hundred and twenty-eight?
Oh. I read it as one point three two eight meters. How do you write that?
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Oh. I read it as one point three two eight meters. How do you write that?
I'm not sure.
English vs German Writing of numbers with point or comma?
Jochen
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@Gerd
I use GraphicConverter 10.6.2.
GC use for reading Metadata the
---- ExifTool ----
ExifTool-Version: 11.03
I check two different files with lens 150 mm and 30 mm.
Both don't show the focus distance.
Jochen
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Hello Jochen,
I have my IQ3100 Tr. / Achromatic files checked. I could not find any value with SubjectDistance in the EXIF data. I was sure I would have seen the value at some point, but I also had different firmwares over time. I can not keep up with that.
But I also took a closer look at the EXIF data from IQ4. For this I have built a tripod and always shot the same motifs with different lenses. The focal point/Object is about ~ 4m away.
Schneider Kreuznach 35mm Br. LS F3.5
(https://up.picr.de/35699436jy.jpg)
Schneider Kreuznach 45mm Br. LS F3.5
The lens does not write a SubjectDistance value in the EXIF data.
(https://up.picr.de/35699438xh.jpg)
Schneider Kreuznach 80mm Br. LS F2.8
The lens does not write a SubjectDistance value in the EXIF data.
(https://up.picr.de/35699439iy.jpg)
Schneider Kreuznach 120mm Macro Br. LS F4
Focus distance switch on the lens to "LIMIT".
(https://up.picr.de/35699440gm.jpg)
Schneider Kreuznach 120mm Macro Br. LS F4
Focus distance switch on the lens to "FULL".
(https://up.picr.de/35699441qc.jpg)
Schneider Kreuznach 120mm Macro Br. LS F4
Focus distance switch on the lens to "FULL".
Nonsense value - camera / lens was not moved or refocused.
(https://up.picr.de/35699442to.jpg)
Schneider Kreuznach 240mm Br. LS F4.5
(https://up.picr.de/35699443vo.jpg)
Mamiya/Phase One 300mm APO F4.5
The lens does not write a SubjectDistance value in the EXIF data.
(https://up.picr.de/35699444ma.jpg)
It is strange that the SK 45mm Br. LS - as one of the newest lenses - does not write a SubjectDistance into the EXIF data. The SK 80mm Br. LS supports AFR with the HAP-2 (Honeybee Autofocus Platform 2.0). To support AFR, I think the camera / lens must know the SubjectDistance to recalculate the autofocus when panning the frame. The SK240 says that it had 1m more distance - which is not true. The SK120 writes - from time to time - nonsense values. And look at the different notations with the thousands point.
From what I've seen, I would not rely on the SubjectDistance values in the EXIF data at IQ4.
I hope this information will help you further, I can not tell you more ...
Greeting Gerd
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@Gerd
Thanks for screenshots.
I have discussed your result with PO.
They don’t know what happened with her system and focus distance.
Crazy.
Jochen
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I admire your stamina to write bug reports to the PO Support.
I thought again about the problem.
The XF knows the MCU position (Motor Control Units) with every modern lens. An MCU is one step with the stepper motor in the lens. With the current MCU value, the aperture and the focal length, PO can calculate the SubjectDistance relatively accurately.
MCU values work on all AF lenses (even older ones) working on the XF. You can see the MCU values in CP1 if you use the XF hyperfocal point tool to find an optimal DoF setting for your lens.
Greeting Gerd