I bought the hood for it. Well, I bought the normal hood, which is tiny but I guess it is better than nothing. I see it more as front-element protection. Quite annoying that with these old style lenses you cannot have both the hood and cap on.
You can, using the later style bayonet 50 lens cap, which fits in the hood, and mounts on the inner bayonet.
Still, a pain to put on and take off with the shade on the lens.