Chinese gear maker YONGNUO has made a 50mm 1.4 EF lens which looks just like the Canon 50mm 1.4 lens.
Specification：
Focal Length 50mm
Lens Structure 6 sets; 7 pieces
Aperture Blade 8 pieces
Minimum Aperture 22
Minimum Focus Distance Approx. 0.45m
Maximum Magnification Approx. 0.15x
Driving System DC motor
Filter Diameter 58mm
Maximum Diameter & Length Approx. Φ75×58mm
Weight Approx. 239g
Features:
First Chinese-built auto focusing lens;
This lens is equipped with 1.4 extra-large apertures which makes the subject delicate and soft; meanwhile, easily blurring out the background and brings you more fun in photography.
Supports AF (Auto Focus) mode and MF (Manual Focus) mode;
This lens carries full-time manual focus function, which makes it easily to fix focus position even in automatically focusing.
This lens supports M/AV/TV/P and other camera shooting modes. The aperture data will be displayed in EXIF;
Supports full frame camera and APS-C frame camera;
This lens adopts 2 pieces of high refractive lenses which can effectively reduce the dispersion.
For more: YONGNUO.
HT Andrew Jones.