Thanks for being so generous with your time David.
I don’t believe there is anything inherently wrong with the images themselves, they look fine in preview.app and in the 4:3 sequence. I should note however that they are all 72dpi TIFF’s, downsized in PS from the original 300dpi TIFF’s supplied by the museum because I read somewhere years ago that one shouldn’t use massively oversampled images for Ken Burns style rostrum animation (in FCE anyway) because of moire effects -that may not be an issue in FCP, particularly if I “send to Motion”.
As an experiment I have reimported a small selection of TIFF’s into the browser and when I drop them onto a video track above the stretched images I note in the Motion tab that they have been interpreted as having an aspect ratio of 42.22 and have no distortion.
By adjusting the aspect ratio of the original images in the track underneath to 42.22 I can eliminate the distortion and the Basic Motion attributes from the 2003 edit are retained which gives me a good starting point for animating them within the new wider frame.
I have no idea where these odd aspect ratio numbers are coming from, perhaps in the fullness of time someone will shed some light, but I can now start the job proper.
Thanks again for paying attention to this issue for me,
All the best,
Mike