The Planar is a double Gauss design. IIRC the 50/2 Sonnars (or one of the other fast 50s) for the prewar Contax were also dG types, so maybe they'd be the original.
Originally Posted by elekm
Last edited by E. von Hoegh; 05-21-2013 at 10:14 AM. Click to view previous post history.