Focal length: 50mm
Maximum aperture: 2.8
Minimum Aperture: 45: CANON, SIGMA, SONY (32: NIKON, PENTAX, 22: FOUR THIRDS)
Lens Construction: 10 Elements in 9 Groups
Angle of View: 46.8 degrees
Number of Diaphragm Blades: 7 Blades
Minimum Focusing Distance 18.9cm/7.4 in.
Maximum Magnification 1:1
Filter Size: 55mm
Dimensions (D x L): 71.4mm x 66.5mm (2.8 in. x 2.6 in.)
Weight: 320g (11.3 oz.)