Having come from a rather insignificant video background I find the new world of cine-style shooting fascinating. Especially the tools. Accessory attachment plates are called cheese plates. And you get Israeli arms. Step down lens rings are called donuts.
Pictured here is a lens hood that covers the gap between my new matte box and the camera lens to keep out light. What's it called? Nun's Knickers. Even in the product catalogue.