Any clue about which lens is this amongst the Steinheil's different designs and uses? It seems to be symmetric. Barrel diameter is 70 mm. Height is 150 mm. Serial number, according to Agostini, places it in 1879. What intrigues me is the placement of connecting ring. All the Steinheil I have seen the connecting ring is like over the rear element, the barrel does not protrudes inside the camera like in this one. It is strange to see it middle of the lens close to the slot for Waterhouse stops. I don't have it with me. It belongs to a friend of mine who lives far from where I am.
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