Embedded Jpegs

I have been doing some reading and I found out that shooting RAW only with the Canon 1D Mark 2 included a embedded jpg. Anyone know how to extract that jpeg, or does it really affect the file enough to even worry about it?

Thanks for any info

I doubt that an embedded jpeg would affect your raw processing. Its really just a thumbnail type of image processed in-camera according to your camera settings to facilitate preview/histogram, etc. Every DSLR with a histogram/review display produces a jpeg from the raw capture whether that jpeg is stored to the card or not. I was not aware that they were sometimes embedded in raw files. That would obviously inflate the file size a little but probably not significantly.
Having the embedded jpeg would speed up file review/browsing for programs that can read them as the raw data wouldn't have to be processed for initial thumbnail generation. But the jpeg display may not match your initial raw rendering intent as it is based on camera settings.

Dan, I don't think you can get rid of the embedded thumbnail, and as Kalin notes, it isn't big enough to worry about.

However, you should check your settings and make certain that a larger JPEG is not also embedded. I don't know what the default options are for the 1DMark2.

As part of my workflow I extract the thumbnail that is included in Nikon RAW files and save it to a "Thumbnails" directory for easy browsing. I also have my computer set up to process NEF files as TIFFs for the purpose of generating thumbnails in Windows, giving me a graphic representation of each file.