Leica Tri-Elmar-M 1:4/16-18-21mm ASPH

Specifications:

Focal Length 16-21 mm
Min. Aperture f/4.0  
Max. Aperture f/22  
Blades: 9  
Elements: 10  
Groups: 7  
Min. Foc. Dist. 0.5 m
AF: no  
Stabilization: no  
Class: Full Frame  
Mount: M  
Filter: 67 mm
Length: 62.0 mm
Diameter: 54.0 mm
Weight: 335 g
Launch: 2006  

Results:

Resolving Power: - σ = 0.0
Contrast: - σ = 0.0
Color: - σ = 0.0
Bokeh: - σ = 0.0
Star: - σ = 0.0
Distortion: - σ = 0.0
Falloff: - σ = 0.0
Flare: - σ = 0.0
LaCA: - σ = 0.0
LoCA: - σ = 0.0
LenScore™ - σ = 0.0

Number of lenses measured: 0