Keywords: Carl Zeis Jena Protar Serie V f18.tif en This is a Carl Zeis Jena Protar Serie V f18 with different two aperture mechanisms 2011-05-26 Carl Zeiss documentation of the Protar photographic lens from 1901 patented by Paul Rudoph 1890 died March 1935 Paul Rudolph PD-old PD-US Uploaded with UploadWizard Carl Zeiss Protar lenses |