Amazon.com : YONGNUO YN35mm F2S DF DSM Auto Focus Wide Angle Prime Lens for Sony, F2 Large Aperture Full Frame APS-C for Sony E Mount Camera : Electronics
Comparing Sigma Art 35mm f1.4 DG HSM (Canon) VS. Yongnuo's 35mm f/2 lens
Amazon.com : Nikon AF FX NIKKOR 35mm f/1.4G Fixed Focal Length Lens with Auto Focus for Nikon DSLR Cameras : Camera Lenses : Electronics
Yongnuo Unveils 35mm f/1.4 Lens with Ultrasonic Motor for Canon DSLRs | PetaPixel