export raw files from photo

Select the photos in the browser in Photos, then use the command "File > Export > Export unmodified Originals".

If you want to save the metadata as well, enable the option "Export IPTC as XMP" in the Export panel.

This will create a sidecar file with the metadata.

Yes, the files with the extension ".CR2" are RAW files from a Canon camera.

For the Panasonic Cameras the extensions would be ".RW2", or for Nikon cameras ".NEF".