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defaultokpzt3ghfgqh
Participating Frequently
February 3, 2023
Answered

EXIF ShutterSpeedValue after Export doesn't match

  • February 3, 2023
  • 4 replies
  • 1376 views

Original RAW shows 1/64th but Adobe JPG on export shows 1/60th.

 

Not sure why that mismatch.


Steps to reproduce:

 

Import raw file

Export all metadata / jpg

Read exif info for raw and exif info for export

This topic has been closed for replies.
Correct answer DS256

It would be useful to know:

  • Which version number of LrC you are using?
  • Which RAW file (camera manufacturer) are you using?
  • Does you camera have 1/64th setting?
  • What are you using to read the shutter speed for the RAW and JPG files?

 

I did a quick test and was not able to replicate your finding with NEF files, using LrC 12.0.1 on Windows 10. I used EXIFTOOL to read the metadata of the files. It could be dependant on the type of RAW file.

 

NEF File

  • [EXIF] Exposure Time : 1/60
  • [Composite] Shutter Speed : 1/60

 

EXPORTED JPG from LrC 12.0.1

  • [EXIF] Exposure Time : 1/60
  • [EXIF] Shutter Speed Value : 1/60
  • [Composite] Shutter Speed : 1/60

 

In LrC

  • Exposure: 1/60 at f/22

 

 

 

4 replies

TheDigitalDog
TheDigitalDog
Inspiring
February 3, 2023

LR shows 1/60th, but then the metadata reported by RawDigger shows two different values when filtering for "Shutter": 

So LR is both right and wrong (as is RD), depending on what you're viewing here. 

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
D
defaultokpzt3ghfgqhAuthor
Participating Frequently
February 3, 2023

The correct thing to do would be to not alter an existing value with a new assumption. I want the data untouched and referenced correctly.

TheDigitalDog
TheDigitalDog
Inspiring
February 3, 2023
quote

The correct thing to do would be to not alter an existing value with a new assumption. I want the data untouched and referenced correctly.


By @defaultokpzt3ghfgqh

There is nothing incorrect. There are two metadata areas for the shutter, as shown. Nothing is being altered! I opened the raw you provided in RawDigger; it reports two different values that exist in your raw. So ask Canon what and why they are providing two different values for the shutter. LR reports one. RD reports two. It is as simple as that. 

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
    D
    defaultokpzt3ghfgqhAuthor
    Participating Frequently
    February 3, 2023

    To help reproduce:

    RAW File here 

     

    1. $ exiftool -a -j -u -g1 -G0 _PAL9420.CR3

    value: EXIF:ShutterSpeedValue 1/64th

     

    2. Lightroom export image > JPG > All Metadata

     

    3. $ exiftool -a -j -u -g1 -G0 _PAL9420.jpg

    value: EXIF:ShutterSpeedValue 1/60th

     

    Hope that helps

    D
    DS256
    Inspiring
    February 3, 2023

    I found a reference to 'Stepless shutter' which you may have and enabled because of camera settings.

    I downloaded a sample CR3 file and found the following references to '*hutter' which seem related to you issue.

    So the question may be what is LrC using

     

    $ exiftool -G Y-JG-CANON-EOS-R7-0002.CR3 | findstr hutter
    [MakerNotes] Slow Shutter : None
    [MakerNotes] Shutter Release Without Lens : Disable
    [EXIF] Shutter Speed Value : 1/49
    [Composite] Shutter Curtain Sync : 1st-curtain sync
    [Composite] Shutter Speed : 1/50

      TheDigitalDog
      TheDigitalDog
      Inspiring
      February 3, 2023
      quote

      So the question may be what is LrC using


      By @DS256

       

      Or Iridient Developer, another raw processor which uses the metadata reported for shutter speed as Lightroom Classic:

       

      So much for a 'bug'? <g>. 

       

      Author “Color Management for Photographers" &amp; "Photoshop CC Color Management/pluralsight"
      D
      DS256Correct answer
      Inspiring
      February 3, 2023

      It would be useful to know:

      • Which version number of LrC you are using?
      • Which RAW file (camera manufacturer) are you using?
      • Does you camera have 1/64th setting?
      • What are you using to read the shutter speed for the RAW and JPG files?

       

      I did a quick test and was not able to replicate your finding with NEF files, using LrC 12.0.1 on Windows 10. I used EXIFTOOL to read the metadata of the files. It could be dependant on the type of RAW file.

       

      NEF File

      • [EXIF] Exposure Time : 1/60
      • [Composite] Shutter Speed : 1/60

       

      EXPORTED JPG from LrC 12.0.1

      • [EXIF] Exposure Time : 1/60
      • [EXIF] Shutter Speed Value : 1/60
      • [Composite] Shutter Speed : 1/60

       

      In LrC

      • Exposure: 1/60 at f/22

       

       

       

        D
        defaultokpzt3ghfgqhAuthor
        Participating Frequently
        February 3, 2023

        Added

        TheDigitalDog
        TheDigitalDog
        Inspiring
        February 3, 2023

        Upload a raw to something like Dropbox so it can be examined.

        Author “Color Management for Photographers" &amp; "Photoshop CC Color Management/pluralsight"
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