Nikon SU-4 brand_Vivitar This compact camera bracket can

This compact camera bracket can be used to mount a camera (or any other threaded accessory) to a lighting stud

It includes a battery

the camera itself runs on 6 AA batteries

this ia a bit of a weird one

but maybe less convenient for fast-action focusing

Nikon SU-4 brand_Vivitar This compact camera bracket canThe Nikon SU 4 is a handy little TTL flash accessory that clips into any Nikon TTL flash and accepts communication from any SU 4 compatible Commander flash. Can also be used in non TTL remote mode. Doesn't need batteries, takes up almost no room, does something real helpful, and they're not making them any more perfect. But hey, here's one now!