Barringer, Charles.

The challenge of wide-angle lenses in the early years of the Contax [article] / by Charles Barringer and Pierpaolo Ghisetti. - 2000.


Contax camera--History.
Lenses, Photographic--History.

Zeiss historica. - Vol.22, no.1 (Spring), p.12-15.

Ghisetti, Pierpaolo.