I can't even remember if I have an original hood for it, think it is a two-piece filter with a Series VI filter holder built in. In a drawer somewhere.
I use Walz vented hoods made for "Canon" for my Canon 50/1.5. It is a very well made, black-finish hood. HEavier than the "Heavystar" hoods. I use them in 40mm for the Canons, and in 40.5mm for the Sonnars. I also have a 46mm Walz hood that I use on a Sonnar with a Step up ring. They are "really nice" hoods.