I took a bunch of pictures, and when I loaded them onto my PC, I discovered the time on my camera was set incorrectly. Now this normally wouldn't be a problem...but I am combining pictures from multiple cameras, and I would like the have the photos sorted chronologically, which is not possible since the timestamps are off on one set of images.
What's a good/easy way to mass adjust the timestamps stored in an image, without affecting any of the other EXIF data or the image data itself? Bonus points if the tool can also adjust the file's timestamp to match the EXIF timestamp, but that's not required.