Rear curtain sync can also be useful for some shots for instance if you want your flash exposure to be "on top" of your ambient light exposure. A Fujifilm X100

Rear curtain sync can also be useful for some shots for instance if you want your flash exposure to be "on top" of your ambient light exposure. A Fujifilm X100F can make use of it's supplementary electronic shutter (in place of its leaf shutter) to simulate rear curtain sync.