Not all data sheets are created equal!
Schneider's MTF graphs contain polychromatic diffraction MTF data - not just geometric MTF data. Schneider's MTF graphs are realistic indicators of actual lens performance in the field. If you are considering a lens from another supplier, it is in your best interests to ask exactly what their data sheets contain.
 

   
Image Circle
Diamter
Flange-to-Image
Distance at ∞
Filter Thread
Componon
2.8/28mm
PDF
30mm*
25.13mm
M 37 x 0.75
Componon
2.8/35mm
PDF
32.5mm*
30.75mm
M 37x0.75
Apo-Componon
2.8/40mm
PDF
43.2mm
38.11mm
M 37x0.75
Apo-Componon
4.0/45mm
PDF
32.5mm
42.35mm
M 37x0.75
Componon-S
2.8/50mm
PDF
43.2mm
42mm
M 37x0.75
Apo-Componon
4.0/60mm
PDF
60mm
53.29mm
M 37x0.75
Componon-S
4.0/80mm
PDF
80.6mm
75.45mm
M 37x0.75
Macro-Symar
5.6/80mm
PDF
141mm**
158.22mm (at ß=-1)
M 37x0.75
Apo-Componon
4.5/90mm
PDF
87.8mm
85.51mm
M 37x0.75
Componon-S
5.6/100mm
PDF
108mm
95.87mm
M 37x0.75
 

Click PDF icon above to view datasheet

* Iris 2.8 only to 11mm. 2/3" recommended.
** For magnifications 1:4 to 4:1.
All lenses require Macro to Leica adapter 25-020054.