What is the proper exif tag to mark a lens as a fisheye?

Question

I'm shooting panoramas with a manual 8mm fisheye lens on my Canon 60D DSLR (APS-C, 1.6x crop factor).

Since the camera cannot talk to the lens, the exif data in the pictures is all wrong. I know how to fix the focal length using ExifTool, but I'm having trouble locating the proper tag to indicate that the lens is a fisheye.

Does anybody know which tag is used to indicate the lens type?

Answer

I don't believe there is an "official" EXIF tag for lens type. As much as I know about EXIF (which admittedly isn't a ton), I believe Lens Type is a "maker note", or additional OEM-specific settings. I believe you can simply add a LensType tag and stuff the name of the lens in that tag. Most tools should recognize that.

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