The Voigtlander Nokton 40mm f/1.2 Aspherical lens for Canon RF mount has been announced by Cosina. It will be the second lens created for the mirrorless mount and only the second third-party lens officially authorized by Canon when it is released in January.

Canon has kept official access to its RF mount under wraps, and only Cosina has received official clearance from the business to build optics for Canon’s mirrorless system. The first, a 50mm f/1 lens, was introduced in February but did not hit the market until October.

While Canon approved it, that lens only has an electronic connection with RF mount cameras to allow for the transfer of EXIF information, access to the camera’s focus assist features, and the ability to work in tandem with Canon’s in-body image stabilization system. It lacks focusing capabilities.

That remains true with Cosina’s new 40mm f/1.2 Aspherical lens. While it does have an electrical connection that allows access to the aforementioned perks, it does not have autofocus.

Nonetheless, it is officially sanctioned by Canon, and Cosina was able to implement an optical system tailored for Canon’s RF mount. Notably, Cosina claims that when utilized with the EOS R, RP, and R6 cameras, a magenta overlay may appear at the frame’s boundaries due to the optical features of the lens.

The new lens, which supports both APS-C and full-frame image circles, is intended for usage by both photographers and videographers, as the manual aperture ring may be clicked and de-clicked.

The Cosina Voigtlander Nokton 40mm f/1.2 Aspherical has an eight-element construction divided into six groups, including two aspherical components. It has an aperture range of f/1.2 to f/22 via a 10-bladed diaphragm, and Cosina claims it allows out-of-focus areas to be “rendered naturally” and spherical and soft point-light sources rather than polygonal ones.

The 40mm f/1.2 lens weighs 400 grams, comes with a lens hood, and has a front filter size of 58mm. Photographer Tatsuo Hata captured the following photographs with the lens, courtesy of Cosina: