Metabones Speed Booster Ultra 0.71x Cine Adapter for Contax/Yashica Lens to Canon RF-Mount Camera

The Speed Booster Ultra 0.71x Cine Adapter from Metabones is designed for Contax/Yashica-mount lens to be used with the APS-C Crop mode in full frame RF-mount cameras and has a magnification of 0.71x, effectively reducing crop factor from 1.5x to 1.07x. The ULTRA design makes very effective use of exotic materials at the furthest limit of glass-making technology and, as a result, is well corrected for use with virtually all full-frame SLR lenses regardless of exit pupil distance. High-speed fixed focal length lenses such as a 50mm f/1.2 will be transformed to a 35.5mm f/0.9 lens with excellent contrast and resolution from the center all the way to the edges of the image.