Shop › Voigtlander 40mm f/2.0 ASPH Septon Z-Mount Voigtlander 40mm f/2.0 ASPH Septon Z-Mount $699.00 sold out Voigtlander 40mm f/2.0 ASPH Septon — a manual-focus lens for Nikon Z Mount. Filter thread: 52mm. Sold Out Added! Voigtlander 40mm f/2.0 ASPH Septon — a manual-focus lens for Nikon Z Mount. Filter thread: 52mm.