This is the first f/1.4 lens for Nikon that I wouldn't hesitate using wide open, leaving little to be desired. With the possible exception of the 35/1.4 AFS G Nikkor, compared to other f/1.4 Nikkors optics in the 35/50 class, it is relatively free of coma and spherical aberration that hindered wide...
High overall IQ; great AF focus accuracy; very high build quality for a non-OEM lens
Corner falloff wide open; focuses in the opposite direction of Nikkor lenses and lack of weather sealing gasket on lens mount