Rare DALLMEYER Patented Portrait Lens No. Deemed goal of English construction.
This specimen N ° 25757 dates from around 1876. Its opening is F 3. A period catalog qualifies it as follows: "The 279 mm foyer N ° 3B is suitable for all portraits foot album, half-body album, bust visit , bust little head album ". This type of Dallmeyer portrait lens was equipped with a special "Soft focus" device, which enhances the degree of definition of the image:...
The Dallmeyer at Portrait can, at will, produce an image of'a rigorous sharpness, or allow to fade the shapes, at the discretion of ...
