What is this thing?

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mykl

Some sort of strange lens assembly I found at a Goodwill many years ago (lemmy.world)

submitted 1 week ago by turbowafflz to c/whatisthisthing

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1000016939

It has 4 lenses in total, two at each end. The only text on it is the number 50, stamped into the bottom of the ring that goes around the outside to attach it to whatever it goes with

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[–] [email protected] 16 points 1 week ago* (last edited 1 week ago) (2 children)

Camera or projector lens, probably of petzval type.

Edit: the lack of an iris or slot for waterhouse stops makes me think projector lens.

[–] Warl0k3 19 points 1 week ago* (last edited 1 week ago)

My first thought, too. Its almost identical to the image from wikipedia's article on petzval lenses, even.

[–] [email protected] 6 points 1 week ago

If you look at the photo of a magic lantern here https://blog.scienceandmediamuseum.org.uk/christmas-magic-lantern-slides/

The front lens cap is very similar.