Leica Camera Lens 11081 User Manual

LEICA SUMMICRON-T 23 mm f/2 ASPH.  
Technical data.  
Illustration 1:1  
Lens  
Leica Summicron-T 23 mm f/2 ASPH.  
Order no.  
11 081  
Compatible cameras  
All Leica T models.  
Field angle  
Approx. 64°, 53°, 35°, corresponding to around 35 mm focal length in 35 mm format.  
(diagonal, horizontal,  
vertical)  
Optical design  
Number of lenses/groups: 9/6.  
Aspherical surfaces: 2.  
Position of entrance pupil at infinity: -22.7 mm.  
Distance setting  
Setting/Function: Electronically controlled.  
Mode selectable using camera menu: Automatic (AF) or manual (M), in AF mode manual override possible at any times  
with setting dial.  
Focusing range: 0.35 m to .  
Smallest object field/largest scale: approx. 295 x 196 mm/1:12.6.  
Aperture  
Setting/Function: Electronically controlled, adjustment using dial on camera, third values also available.  
Lowest value: 16.  
Bajonet fitting  
Leica T quick-change bayonet with contact strip for Leica T models.  
Filter mount/  
Lens hood  
External bayonet fitting for lens hood (included), internal thread for E52 filters, filter mount does not rotate.  
Finish  
Black anodized.  
Dimensions and Weight  
Length to bayonet mount: approx. 37/69 mm (without/with lens hood).  
Largest diameter: approx. 63/73 mm (without/with lens hood).  
Weight: approx. 154/186 g (without/with lens hood).  
Page 1 of 3 As at July 2014 Specifications are subject to change without notice  
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Leica Camera AG Am Leitz-Park 5 35578 WETZLAR GERMANY Telephone +49(0)6441-2080-0 Fax +49(0)6441-2080-333 www.leica-camera.com  
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LEICA SUMMICRON-T 23 mm f/2 ASPH.  
MTF DIAGRAMS  
Focal length 23 mm  
Infinity  
Close focus distance  
Aperture stop 2.0  
Aperture stop 2.0  
[%]  
[%]  
100  
100  
80  
60  
40  
20  
0
80  
60  
40  
20  
0
0
3
6
9
12  
0
3
6
9
12  
Y'[mm]  
Y'[mm]  
Aperture stop 5.6  
Aperture stop 5.6  
[%]  
[%]  
100  
80  
60  
40  
20  
0
100  
80  
60  
40  
20  
0
0
3
6
9
12  
0
3
6
9
12  
Y' [mm]  
Y' [mm]  
Sagittal structures  
Tangential structures  
MTF GRAPHS  
The MTF is indicated both at full aperture and at f/5.6 for long distances  
(infinity) and close focussing distance. Shown is the contrast in percentage  
for 5, 10, 20 and 40 lp/mm across the height of the 35 mm film format,  
for tangential (dotted line) and sagittal (solid line) structures, in white light.  
The 5 and 10 lp/mm will give an indication regarding the contrast ratio for  
large object structures. The 20 and 40 lp/mm records the resolution of  
finer and finest object structures.  
Page 3 of 3 As at July 2014 Specifications are subject to change without notice  
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Leica Camera AG Am Leitz-Park 5 35578 WETZLAR GERMANY Telephone +49(0)6441-2080-0 Fax +49(0)6441-2080-333 www.leica-camera.com  
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Download from Www.Somanuals.com. All Manuals Search And Download.  

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