What's the difference between the various OM hotshoes (hot shoe 1 ,2 ,3 .. etc)? I always thought a hot shoe was a hot shoe.
Each was designed for a different flash/camera combination as the system advanced. It's important to get it right. I can't remember all the info. but I know I have it documented somewhere. It's late, I'll get back to you.
Shoe 1: the OM-1
Shoe 2: the OM-2 non-TTL
Shoe 3: the OM-2 TTL enabled shoe
Shoe 4: the OM-1N and the OM-2N
mopar guy is right, but check the link below for more info..