Mount
Leica M
Groups
4
Coating
single-coated
Elements
9
Weight
240g
Filter Thread
39mm
Length mm
27
Diameter mm
51
Max Aperture
f/4
Min Aperture
f/22
Min Focus Distance
40cm
Production End
1963
Aperture Blades
9
Introduced
1958
Focal Length (Max)
21mm
Focal Length (Min)
21mm
Production Start
1958