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Where does the EOS50D Hide JPEGs?

I know the EOS50D is saving a JPEG with each raw file because Lightroom finds and displays them before switching to the raw image. However after mounting the memory card in the Mac Finder, all I see are raw images:

_MG_7463.CR2

Nor can I get Lightroom to load the JPEGs as separate files, only as previews, despite checking the preference to “Treat JPEG files next to raw files as separate photos”.

Where are the JPEG files hiding? Are they embedded in the raw files somehow, or are they somehow marked as hidden?

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This entry was posted on Friday, May 8th, 2009 at 8:34 AM and is filed under Photography. You can follow any responses to this entry through the Atom feed. You can skip to the end and make a comment. Pinging is currently not allowed.

2 Responses to “Where does the EOS50D Hide JPEGs?”

  1. Me Says:
    May 8th, 2009 at 10:58 AM

    There is a JPEG embedded inside the Raw files.

    For some Canon cameras, this JPEG file is smaller than the RAW image. For the newer Canon cameras, it is the same size.

  2. Vincent Says:
    May 8th, 2009 at 11:07 AM

    dcraw (http://www.cybercom.net/~dcoffin/dcraw/) is able to extract the embedded thumbnail file. I believe that the “Treat JPEG files next…” switch is used/useful when you’re shooting in “RAW+JPEG” on the camera, which actually generates 2 files on the memory card, although I have not used LR before.

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