Exiftool can remove metadata from Nikon but not Canon...?

[inte]

Removing metadata from Nikon D3s images works fine, does not work for either Canon Powershot G11 or S90.

Here's the command line I'm typing:

exiftool -make= -model= -fnumber= -exposuretime= -iso= -makernotes= -copyright='Shooter'=

Works perfectly with Nikon D3s files, however Fstop and shutter speed remain on the Canon Powershot files.

Why would this be?

[Phil Harvey]

You must also remove ApertureValue and ShutterSpeedValue.

- Phil

[inte]

Perfect!