Shop › Voigtlander 21mm f/4.0 Pancake VM Voigtlander 21mm f/4.0 Pancake VM $419.00 sold out Voigtlander 21mm f/4.0 Pancake — a manual-focus lens for Leica M Mount. Filter thread: 39mm. Color Skopar. Sold Out Added! Voigtlander 21mm f/4.0 Pancake — a manual-focus lens for Leica M Mount. Filter thread: 39mm. Color Skopar.