I've been given a 1920s Lantern slide projector, it's pre-1926 as the main lens is a 12" Aldis-Butcher Projector lens. Butcher finally fully merged with Houghton in 1926, also I have the original owner's Lantern slides and title slides indicate lectures in 1926. This is not a home projector it's designed for large halls, and the photographer was a member of a large photographic society in Birmingham (UK) and lecturing at others. It's a 1920s projector.
Now to the enigma, the second lens is very much older (50-60 years) and a 6" Petzval. It's missing the focus pinion and has a slot for Waterhouse stops and the internals for the stops in the barrel, but the focus sleeve doesn't have the cut-out to allow focus with a stop in place. There are some clues.
It's in need of a clean, but clearly says Carte De Visite, Squire & Co, Sheffield, so it was not a Projection lens.
When J.H. Dallmeyer introduced the Rapid Rectilinear lens in 1866 many companies were left with large unsold stocks of Petzval taking lens. I have a few Petzval lenses, this isn't particularly swirly compared to others.
Ian
Now to the enigma, the second lens is very much older (50-60 years) and a 6" Petzval. It's missing the focus pinion and has a slot for Waterhouse stops and the internals for the stops in the barrel, but the focus sleeve doesn't have the cut-out to allow focus with a stop in place. There are some clues.
It's in need of a clean, but clearly says Carte De Visite, Squire & Co, Sheffield, so it was not a Projection lens.
When J.H. Dallmeyer introduced the Rapid Rectilinear lens in 1866 many companies were left with large unsold stocks of Petzval taking lens. I have a few Petzval lenses, this isn't particularly swirly compared to others.
Ian