35mm M Glass On GFX Medium Format (2 of 2): Voigtländer Nokton 40mm f/1.2 Aspherical. I have written about this lens as used as originally intended… ..35mm, full frame format on a Leica rangefinder. Short version I really liked it. Looked good while it was at it. After a recent turn of events it has … Continue reading 35mm M Glass On GFX Medium Format (2 of 2): Voigtländer Nokton 40mm f/1.2 Aspherical.