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. 64Ā°, 53Ā°, 35Ā°, 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 inļ¬nity: -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 ā.
Smallest object ļ¬eld/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 ļ¬tting
Leica T quick-change bayonet with contact strip for Leica T models.
Filter mount/
Lens hood
External bayonet ļ¬tting for lens hood (included), internal thread for E52 ļ¬lters, ļ¬lter 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 Speciļ¬cations 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 Speciļ¬cations 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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