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.
 

   
Extension
Tube (mm)
Magnification
Range
Working
Distance
(mm)
Filter Thread
Max.
Image
Circle
Cinegon
1.8/4.8mm
Compact
PDF
none
∞ - 2.7
∞ - 0.0
M62x0.75*
11mm
Cinegon
2.1/6mm
Compact
PDF
none
∞ - 2.5
∞ - 0.0
M62x0.75*
11mm
Cinegon
1.4/8mm
Compact
PDF
none
∞ - 1.7
∞ - 0.0
M30.5x0.5
11mm
Cinegon
1.4/12mm
Compact
PDF
none
∞ - 2.5
∞ - 57.7
M30.5x0.5
11mm
Xenoplan
1.4/17mm
Compact
PDF
none
5mm
8mm
∞ - 3.5
3.5 - 1.8
2.2 - 1.4
∞ - 42.0
42.0 - 11.2
18.9 - 4.0
M30.5x0.5
11mm
Xenoplan
1.4/23mm
Compact
PDF
none
5mm
8mm
10mm
∞ - 4.5
4.5 - 2.3
2.8 - 1.7
2.3 - 1.5
∞ - 81.7
81.7 - 31.1
43.7 - 19.4
31.1 - 14.2
M30.5x0.5
11mm
Xenoplan
1.9/35mm
Compact
PDF
none
5mm
8mm
10mm
13mm(8+5)
15mm(10+5)
∞ - 7.0
7.0 - 3.5
4.4 - 2.7
3.5 - 2.3
2.7 - 1.9
2.3 - 1.7
∞ - 246
246 - 125
155 - 96.6
125 - 84.1
96.6 - 70.5
84.1 - 63.7
M30.5x0.5
11mm
Tele-Xenar
2.2/70mm
Compact
PDF
none
5mm
8mm
10mm
∞ - 0.125
0.125 - 0.19
0.19 - 0.24
0.24 - 0.27
∞ - 590
590 - 390
390 - 320
320 - 280
M49x0.75
11mm
 

Click PDF icon above to view datasheet
Explanation of nomenclature in datasheets.

*Requires Filter Adapter 21-014604 for Cinegon 1.8/4.8mm Compact