Series of lenses illustrating the manufacture of No.4 series 2 Dallmeyer Stigmatic F/6 lens
Series of lenses illustrating the manufacture of No.4 series 2 Dallmeyer Stigmatic F/6 lens shown in 5 stages, 5 pieces in each stage
Series of lenses illustrating the manufacture of No.4 series 2 Dallmeyer Stigmatic F/6 lens shown in 5 stages, 5 pieces in each stage
