I just need some information. I am a retire4d se4mi-pro magician that is going to write a book. In it I will need some photos of my hands from the back to illustrate how to do some slight of hand moves. I was thinking of possibly using a gopro with a chest harness for this purpose and need to know if it can take single photos instead of videos and how that would be accomplished since both my hands would be occupied with the various moves