Brass Lens - Wray London Wide Angle Rectilinear

Before 19 century, the lens design could not overcome the barrel distortion for wide angle lenses. However, Dallmeyer designed the Rapid Rectilinear lens in 1866 changing the world of lens. The design corrects serious barrel distortion in wide angle lens. The following is the sample of appearance with and without rectilinear design lenses.

Wray London was a British optical company to design and manufacture cameras and lenses in 19-20 centuries. She produced Wide Angle Rectilinear lens under the design of Dallmeyer. Although the focal length is 6in (150mm), the coverage is 8x10" because of wide angle design, same as coverage of Schneider Super-Symmar 150XL. 

There is less information about this lens at internet, may be because of the design was by Dallmeyer. It is uncoated lens but its colour appearance is excellent. As its focal length as a standard lens of 4x5", so I often use it.