Vologda 200mm f4 Jupiter-21M for M42 Filter Type_UV This round metal hood uses

This round metal hood uses a bayonet fitting which will only mount on its intended lens

Leave those no good lazy cameras behind the line that makes the guy blow the whistle

which is to say that it's not just a terrestrial camera in a bulky housing

Olympus OM-4 with a good Olympus OM F

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

Vologda 200mm f4 Jupiter-21M for M42 Filter Type_UV This round metal hood usesThe 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.