ColorBW Canon Maker Note - what does the "BW" stand for?

[blue-j]

Color BW

Does this just mean, was it in color or black and white mode?

- J

[Phil Harvey]

This is one of the few tags that is actually documented (page 19, here):

colorBW:
LS-byte: 0: grayscale; 1: color
2nd byte: Indicates whether post-processing (pixel aspect-ratio conversion) should be applied (value 1) or not (value 0).
For cameras which do not employ square-pixel CCDs, this value should be set to 1 if it is desired that the aspect ratio of the pixels should be converted after the images are recorded. If the converted images are then re-recorded in CIFF JPEG format, this value should be switched to 0.
3rd and 4th bytes: reserved 0

- Phil

[blue-j]

Yowsa!  Thanks, Phil!  I'll keep that bookmarked.  - J