Photomerging using two cameras

Hi,
I'm working on a project and recently got PS5 specifically for the project.  I have two canon 5D Mark IIs and I am trying to photomerge two simultaneously captured shots, or two shots captured seconds after the other of a still subject.  For some reason, it won't merge the images.  I suspected that the problem might be that I am using two cameras to take the shots so I attempted using one camera and then moving it to the location of the other.  That worked.  Does anyone know why this might be?  If so, is there any work-around.  Doing it with one camera kind of defeats the purpose of my project and is the whole reason we purchased two set-ups.

It certainly is not necessary that the component images of a panorama have the same serial numbers for camera bodies or lenses. I have made several panoramas out of old slides or negatives that I scanned with a flatbed scanner. But Photohop may have problems if the EXIF data explicitly shows that the bodies or lenses are different. You can check if different EXIF data is the culprit by copy-pasting pixels from a camera B images to camera A images. That way you have pixels from the A and B cameras but EXIF data only from camera A.
Regards, Antero

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