Focal length: 50mm
Maximum aperture: 2.8
Minimum aperture: 32
Number of Blades: 7 blades
Filter Diameter : 55 mm
Lens construction: 7 elements in 6 groups
Magnification: x1.0
Minimum Focus Distance : 7.8" (2.3m)
Dimensions (D x L): 2.13/16" x 2.3/8" (71mm x 60mm)
Weight: 10oz (295g)