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Honored Contributor
Posts: 5,024
Registered: ‎06-25-2014

Re: Can I tell which memory card was used to record an image on my 5D III?


@jrhoffman75 wrote:

OP is looking to get info on past shoots. 


The (admittedly subsidiary) point is that the way the camera shuffles its card slots offers no help in doing that.

 

But to your point: Even though getting useful info on past shoots may be futile, it shouldn't matter much. Either the striping problem was a one-time fluke, in which case it can be ignored, or it wasn't, in which case it should be possible to test whether its ocurrence is related to which card slot is in use. Even though the camera doesn't record that datum in the Exif data (although one supposes that it could), it's not particularly hard to keep track of it manually.

Bob
Philadelphia, Pennsylvania USA
Honored Contributor
Posts: 5,024
Registered: ‎06-25-2014

Re: Can I tell which memory card was used to record an image on my 5D III?


@Waddizzle wrote:

@RobertTheFat wrote:

@Waddizzle wrote:

Remove the SD card, and it will always use the CF card.


Even if the camera is off when you remove the card! And even if you put the SD card back in before turning the camera back on!! (And BTW it works the same way in the other direction, i.e. if it's the CF card that you remove.) I've complained about that behavior several times to no avail. Canon apparently thinks it makes sense for it to work that way, and I think they're nuts.


In a way, it does make sense.  You want the camera to pick up right where it left of, and continue using the re-inserted card.  But, how is the camera to know that you re-inserted the same card?  How is it to know that even though you've re-inserted the same card, that the card has not been modified in some way? 


What difference does either of those questions make? The only thing the camera cares about is the sequence number, and it just bulls ahead with that across any slot change. The only thing it has to be concerned about is not re-using a file name that's already on the card, and that's as likely to happen on the first slot change as on the second.

Bob
Philadelphia, Pennsylvania USA
Honored Contributor
Posts: 5,843
Registered: ‎11-13-2012

Re: Can I tell which memory card was used to record an image on my 5D III?

The 1D series (at least Mark IIN and Mark IV) work exactly like Bob would like to see. For some reason Canon sees fit to have the "lower" product lines work differently. 

John Hoffman
Conway, NH

1D X, Rebel T5i, Many lenses, Pixma PRO-100, MX472, LRCC Classic
Honored Contributor
Posts: 5,024
Registered: ‎06-25-2014

Re: Can I tell which memory card was used to record an image on my 5D III?


@jrhoffman75 wrote:

The 1D series (at least Mark IIN and Mark IV) work exactly like Bob would like to see. For some reason Canon sees fit to have the "lower" product lines work differently. 


I'm not sure the situations are totally comparable. IIRC, the 1D series had two CF slots (primarily for redundancy), rather than one of each type (primarily for compatibility) like the 5D3 and the 7D2. But either way, I think the 1D's behavior is the preferable one.

Bob
Philadelphia, Pennsylvania USA
Honored Contributor
Posts: 5,843
Registered: ‎11-13-2012

Re: Can I tell which memory card was used to record an image on my 5D III?

At least through Mark IV it was CF and SD. I read early on the concept was that the SD card would be for small JPEGs so a runner could take a card from photog and get it to a computer for quick upload to web, newspaper etc. The days before WiFi. A new SD card would be installed and shooting continue. CF card would be for RAW or large JPEG for later processing.

Makes sense that it wouldn't be good for storage scheme to change when card was removed.
John Hoffman
Conway, NH

1D X, Rebel T5i, Many lenses, Pixma PRO-100, MX472, LRCC Classic
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Occasional Contributor
Posts: 24
Registered: ‎11-10-2016

Re: Can I tell which memory card was used to record an image on my 5D III?

[ Edited ]

Waddizzle, thanks for the idea!  Duh, why didn't I think of that, but I guess this is what happens when you are too close to the problem.

 

This may not give me information on past shoots, but it is an experiment that I can use to attempt to isolate the culprit, if indeed it is the memory cards that are causing the problem.  It may even isolate THE card, so I will shoot a series of images with the CF card out and simply repeat with the SD cards.  Thanks again.

 

To those of you who noted what Canon does or does not do, all I can say in my years of shooting both film and digital is that Canon does whatever it wants and whether or not it has any bearing on what users want seems to be irrelevant.  I too would like to have the data telling me which card was used to capture a particular set of images.  The CF cards would appear to have serial numbers on them - don't know about the SD cards, but I am going to assume they have some form of identification on them.  Why digital cameras can't read this information and report it as part of the EXIF data, I don't know.

 

WesternGuy

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