Going through my late dad's stuff, I found a bunch of vintage cameras (including a Lumicon Silver 8, a Kodak Six-20 Brownie C, and a Kodak Brownie Reflex).
There is one piece of equipment I couldn't identify - it's a lens that looks very old, seems to be made of brass, and says "HERMAGIS OPTn BteS GDG PARIS OBJECTIF CINEMA". I remember using this as a kid as a "magnifying glass". Now it clearly is a cinema camera lens, but since it doesn't have any other markings, I'm stuck.
I've googled "Hermagis lens" and similar but none of the pictures match. Here's a couple of pictures of mine:
How can I find out what this is?
On closer inspection, the lens seems to have two outer threads - maybe this is two different things screwed together? Like a lens and (part of) the thing with the shutter? The french "objectif" throws me off a bit here (and this would be written in the non-lens part, if this is indeed two parts). May try to use some oil to unscrew it.
The plot thickens! After warm water, soap, and oil, I managed to get everything unstuck. This revealed a couple of new inscriptions in the lens itself:
Seems to say "90 + 11 Hermagis". Still doesn't really tell me what it is :(
I also believe this is actually one full lens (the glass and the two smaller metal parts) and part of a second lens (the big metal part with the HERMAGIS inscription). These two were very stuck but not actually screwed together:
The outer ring is a bit bent so I can't put the lens and the small ring that holds it, so I can't confirm this theory yet. But now the whole thing may be easier to identify :)