Oh, and by the way, Mustafa, not only is the Frontar not a Dagor, not all of Goerz f/6.8 Doppelanastigmats are Dagors. Goerz made a number of f/6.8 dialyte type double anastigmats. If Goerz made it and it isn't engraved "Dagor" or "Doppelanastigmat" and "Serie III" it isn't a Dagor.