This revised edition (Type II) benefits from a new aperture control mechanism which allows the user to switch between "clicked" and stepless operation as required, just like the Voigtlander Nokton 42.5mm f/0.95 and Nokton 17.5mm f/0.95. The Voigtlander NOKTON 25mm F0.95, a new, ultra-fast standard prime for Micro Four Thirds cameras. The Nokton 25mm f/0.95 - which is not to be confused with the Noktor 50mm f/0.95, a longer and altogether completely different lens made by another company - is a genuine Micro Four Thirds lens that does not require the use of an adapter. Like other current Voigtlander lenses, the Nokton 25mm f/0.95 is manual-focus only, and comes with a distance scale complete with depth-of-field marks; something unique among MFT lenses. Constructed of 11 elements in 8 groups, this new 25mm lens has a diagonal angle of view of 47.3° essentially the same as that of a 50mm lens on a 35mm camera.