The useful wide angle focal length of 28mm and a maximum aperture of F/2, make it one of the fastest 28mm lenses. This focal length is suitable for photographing the majority of wide angle subjects, and the construction is designed to enhance sharpness. Other desirable optical characteristics include corner-to-corner sharpness even at maximum aperture and at close focusing distances. This lens features the "floating" focusing system.
Construction: 10 elements in 9 groups
Angle of view: 75 degrees
Minimum focus: 1ft
Aperture range: 2-22