I found a nice Nikkor 50/2 AI (a lens I have never used or owned), and it is on the way. I see that the HS-2 and HS-6 are the correct hoods. I gather neither is a screw-in hood. I tend to like screw-in hoods. Anyway, which hood should I buy?
You can use the rubber HR-1, which screws in and can be collapsed, or I often use the HN-7, all metal screw in, a bit long but doesn't clip and helps out here in strong backlit.
The HN-5 is meant for the 50's. Personally, I haven't had issues with the HS-2's (or even the older "F Nikkor 50/2" version). It does come in handy to be able to store the hood reversed on the lens. Helps keep the focusing ring from getting damaged, if the camera happens to be dropped while the hood is attached.
I appreciate the comments. What is a "snap-on" hood? I am familiar with the clamp-on and bayonet types, but am unsure as to what "snap-on" would designate.
The front element is reasonably deep, so the need for a hood is not that bad.
The snap-on hoods snap on. They have a little lock button you press to release. I have one on my 105/2.5 AI. They will mount to a filter, which is nice, whereas the screw-in filters require your filter (if you're using one) to have threads.
The snap-on hood is basically just a threaded hood with a broken thread. You have a pressure button which you use to depress the hood threads inwards. After releasing the button the hood threads are secured against the filter threads on the lens. I find it pointless and if you have the option for a screw-in hood just use that. The hoods don't have a reason to be removed with the small size of manual Nikkors.