Shop › Voigtlander 28mm f/2.0 APO Lanthar ASPH -Ultron VM Voigtlander 28mm f/2.0 APO Lanthar ASPH -Ultron VM $1,149.00 sold out Voigtlander 28mm f/2.0 APO Lanthar Apo ASPH -Ultron — a manual-focus lens for Leica M Mount. Filter thread: 49mm. Sold Out Added! Voigtlander 28mm f/2.0 APO Lanthar Apo ASPH -Ultron — a manual-focus lens for Leica M Mount. Filter thread: 49mm.