photo info problem - changing time exif data

[Guest]

I've been carrying two cameras on recent shoots. 5D with 16-35 and 20D with
70-300. It's working well and I'm catching so many more shots by not
stopping to switch to the zoom. The crop factor on the 20D makes it the
perfect "long distance" body.

Problem is that I now have thousands of pictures, but have discovered that
the camera system clocks were not in sync.

I'm trying to use Photo Info to adjust the time on the 5D images (by minus 1
hour). However, when I select the images and edit them as a "collection", it
changes the time on every image to the time on the one I'm looking at when
the change is applied. I need it to change each file by minus 1 hour.

I can change each individually, but it'll take months to do so!

Prresumably I'm just being stupid, so any help much appreciated!

Regards,
Charles

 

[Guest]

I just downloaded Photo Info for the same reason (and to start taking
advantage of tags to sort my tens of thousands of photos).
I experienced exactly the same problem, and didn't see any alternative way I
could have tried to apply the time-shift. I presume this is a bug in the
Photo Info tool...
I'm yet to try applying keywords to a batch of photos, but given that it
messed up my EXIF timestamps (lucky I still have the originals), I'm going to
do some testing on some duplicate files first!