Focal length: 21 mm
Maximum aperture: 2.8
Minimum aperture: 22
Diagonal Angle of View: 90o
Closest Focusing Distance: 0,5m/1.8"
Lens Construction: 9 elements in 7 groups
Image ratio at close range: 1 : 21
Coverage at close range: 47 cm x 71 cm
Filter: M 46 x 0.75
Dimensions (D x L) : 53 mm x 75 mm
Weight: 280g