Yongnuo will soon announce a new YN 40mm f/2.8 full frame DSLR pancake lens. The details, including technical specifications, MTF charts and lens design can be found over at NikonRumors:
New: Yongnuo YN 40mm f/2.8N and 100mm f/2N full frame DSLR lenses for Nikon F-mount
Yongnuo lenses are sold at B&H, Adorama and Amazon and come for both Nikon and Canon mounts.
Via NikonRumors
