Vologda 200mm f4 Jupiter-21M for M42 Filter Type_UV The Nikon HS-8 is a

The Nikon HS-8 is a round metal hood for 52mm threaded lenses (snap-in with lever type)

Bounce-back disc

Leitz FOOBD graduated green filter for A36 slip-on mount

so they get very hot- they are definitely not toys- but if you need to fill a room with light

Vologda 200mm f4 Jupiter-21M for M42 Filter Type_UV The Nikon HS-8 is aThe Vologda 200mm f4 Jupiter 21M lens is a heavily built telephoto lens, with a metal barrel and a built in retractable lens hood. Its designed for use on M42 mount cameras, and though it has a manual autodiaphragm switch, both work as a manual diaphragm. Not ideal, but totally usable. Optics are clean, and focusing action is nice and smooth.