Focal length: 21 mm
Maximum aperture: 4.5
Minimum aperture: 22
Diagonal Angle of View: 90o
Closest Focusing Distance: 0.5 m
Lens Construction: 8 elements in 6 groups
Image ratio at close range: 1 : 20
Coverage at close range: 48 x 72 cm
Filter: M46 x 0.75
Dimensions (D x L): 53 mm x 56 mm
Weight: 210 g