I bought this lens second hand a few years ago, it is a Canon FD fit. Like a lot of lenses of this age there is a small amount of dust inside and there may be a little fungus, but it doesn't seem to affect photos (See last two photos of taken of my cat with the lens).

This is an old manual zoom & focus camera lens (not automatic) made of metal, and weighs around 700g and has lens caps both ends.