Amazon.com : YONGNUO YN50mm F1.8 Lens Large Aperture Auto Focus Lens Fixed Standard Prime Lens YN50mm F1.8C Compatible with Canon EF Mount EOS Camera : Camera & Photo
Nikon 50mm 1.8G vs Yongnuo 50mm 1.8 with Nikon D5100 - YouTube
Yongnuo YN50mm f/1.8 - Yongnuo prime lens for Nikon - Camera Gear