topic Re: Electronic shutter - was it used ? in EOS DSLR & Mirrorless Cameras

Electronic shutter - was it used ?

PeteGB — Thu, 14 Oct 2021 10:42:55 GMT

I shot some 3000 images at a recent Mountain Bike event with my relatively new R5. I used the opportunity to experiment with different camera setting and perhaps naively assumed that I'd be able to tell from the EXIF data whether or not I'd used the electronic shutter.

I'm not surprised that Lightroom won't tell me but I was sure that DPP would show it.

For the life of me I can't find it anywhere and I can't find anything about if it's possible using Google. Any attempt to frame the question brings back a lot of links about using electronic shutter.

Can anyone here advise me if it's possible to determine what shutter mode was used to take a picture and if so how ?

Many thanks

Pete

Re: Electronic shutter - was it used ?

unclejace54 — Thu, 14 Oct 2021 12:51:47 GMT

Camera has 3 choices for the shutter. As far as I know the shutter settings are not recorded in image data other than speed.

Re: Electronic shutter - was it used ?

jrhoffman75 — Thu, 14 Oct 2021 14:09:04 GMT

I have a 1D X Mark III with ES.

I verified that the Info tab in DPP does not list which shutter type was used.

Re: Electronic shutter - was it used ?

johnrmoyer — Thu, 14 Oct 2021 18:03:30 GMT

I use exiftool on both my Debian Linux machine and on my iMac.

Exiftool reports for a CR3 file:

"Shutter Curtain Sync : 1st-curtain sync"

Or an example command line for a JPEG file to show only that value:

exiftool -ShutterCurtainHack IMG_4652c.JPG

Re: Electronic shutter - was it used ?

kvbarkley — Thu, 14 Oct 2021 19:00:47 GMT

That's a flash setting, it has nothing to do with electronic or mechanical shutter.

Re: Electronic shutter - was it used ?

johnrmoyer — Thu, 14 Oct 2021 19:19:18 GMT

Sorry, you are correct

@kvbarkley wrote:
That's a flash setting, it has nothing to do with electronic or mechanical shutter.

Re: Electronic shutter - was it used ?

johnrmoyer — Fri, 15 Oct 2021 00:23:06 GMT

I am making a wild guess here. I used exiftool -v -U to dump 3 black frame photos made in manual mode with the three shutter modes and looked at the differences. The "100" value for flash info is there for electronic shutter and not for electronic first curtain nor for mechanical. This might be a way to identify use of electronic shutter if there is different flash behavior in elctronic shutter mode. I have also included two other diff fragments that I might guess would be worth looking at.

In this diff fragment, electronic shutter is to the left and mechanical shutter to the right:

In this diff fragment, electronic first curtain is to the left and electronic shutter is to the right:

Re: Electronic shutter - was it used ?

johnrmoyer — Fri, 15 Oct 2021 00:55:50 GMT

It might be coincidence, but I suspect that this value is shutter mode:

0 == mechanical

1 == electronic first curtain

2 == electronic shutter

Re: Electronic shutter - was it used ?

Peter — Fri, 15 Oct 2021 08:29:55 GMT

Could you take 3 pictures of each and upload the raw files?

Re: Electronic shutter - was it used ?

johnrmoyer — Fri, 15 Oct 2021 13:04:45 GMT

@Peter wrote:
Could you take 3 pictures of each and upload the raw files?

I put 3 raw files and text dumps of the output of exiftool on my web server at https://www.rsok.com/~jrm/raw/

I hope this helps. I do not know where else to upload them.

Re: Electronic shutter - was it used ?

Peter — Fri, 15 Oct 2021 15:28:17 GMT

I checked M50 II and 0x0a15 is 0. M50 II only has electronic first curtain shutter. I checked M5 and 0x0a15 is 331451531.

Re: Electronic shutter - was it used ?

johnrmoyer — Sat, 16 Oct 2021 18:27:11 GMT

It will be available in the next release of exiftool.

https://exiftool.org/forum/index.php?topic=12925.0

Phil Harvey

ExifTool Author
Administrator
ExifTool Freak

Re: Canon EOS R5 shutter mode

« Reply #9 on: Today at 12:40:09 PM »

Hi John,

Great, thanks! This is very definitive.

I'll add decoding for this to ExifTool 12.33 (to be released later today).

When testing this, I also found a sample with a value of 3, so there will be a few unknown shutter modes out there.

- Phil

Re: Electronic shutter - was it used ?

Peter — Sat, 16 Oct 2021 19:21:07 GMT

I saw the release just a few minutes ago and found your name there ^^

Re: Electronic shutter - was it used ?

Peter — Sat, 16 Oct 2021 19:24:48 GMT

Btw, how do you check the difference between Exif tags in an easy way?

Re: Electronic shutter - was it used ?

johnrmoyer — Sat, 16 Oct 2021 21:28:07 GMT

I use Linux and macOS. I use ksh as my login shell on both. (I have used ksh since 1987 and I am slow to change.) I do not know of an easy way to do this when running Windows. Before I retired and was required to run Windows by my employer, I compiled versions of diff and less that worked from a CMD command line or ran Linux in a virtual machine. Phil Harvey wrote his own mult-diff program for testing exiftool. It has been more than 20 years since I wrote anything in Perl and it is likely that I would not understand his tools. CMD does have a for loop and variables, but it seems awkward to me.

I hope this example helps (I expect that it would work in any POSIX standard shell).

for i in 4677 4678 4679 4680 4681 4682 4683
do
exiftool -v3 -U IMG_${i}.CR3 > $i.exif
done

diff 4677.exif 4678.exif | less
diff 4677.exif 4679.exif | less

Find all CR3 files with "Canon_FileInfo_0x0017 = 2". (Edited to fix typos)

find ~/photos -name "*.CR3" | xargs exiftool -v3 -U | egrep "Canon_FileInfo_0x0017 = 2"

Re: Electronic shutter - was it used ?

Peter — Sat, 16 Oct 2021 20:11:06 GMT

Thanks! I am using Ubuntu and what you wrote is understandable.

Re: Electronic shutter - was it used ?

Peter — Mon, 18 Oct 2021 10:38:02 GMT

Worked.