Leica Camera Lens 11645 User Manual

LEICA SUMMARIT-M 75 mm f/2.5  
1
The LEICA SUMMARIT-M 1:2.5/75 mm is a new "short telephoto" lens that is significantly smaller and lighter than Summicron  
lenses with the same focal length, but still offers the image quality that is the hallmark of Leica M lenses. Combined with the 35  
mm Summarit-M, it makes up an ideal shooting outfit with a useful lens speed that opens up fascinating composition options for  
Leica M photographers. The new 75 mm Summarit-M replaces the portrait focal lengths of 90 -100 mm for digital use. Its excep-  
tionally compact design and performance bring a new level of flexibility to rangefinder photography.  
Lens shape  
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LEICA SUMMARIT-M 75 mm f/2.5  
3
MTF graphs  
Aperture Stop 5.6  
Aperture Stop 2.5  
[%]  
[%]  
100  
80  
60  
40  
20  
0
100  
80  
60  
40  
20  
0
0
5
10  
15  
20  
0
5
10  
15  
20  
Y' [mm] = 21.0000  
Y' [mm] = 21.0000  
Aperture Stop 4.0  
[%]  
100  
80  
60  
40  
20  
0
The MTF is indicated both at full aperture and at  
f/5.6 at long taking distances (infinity). Shown  
is the contrast in percentage for 5, 10, 20 and  
40 lp/mm accross 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.  
sagittal structures  
_ _ _ _ _ _ _ _  
0
5
10  
15  
20  
tangential structures  
Y' [mm] = 21.0000  
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LEICA SUMMARIT-M 75 mm f/2.5  
4
Distortion  
Relative Distortion  
Effective Distortion  
[%]  
5
4
Y'[mm]  
3
12  
9
2
1
0
-1  
-2  
-3  
-4  
-5  
6
3
0
0
0
5
10  
15  
20  
3
6
9
12 15 18  
X'[mm]  
Y' [mm] = 21.0000  
Vignetting  
Distortion is the deviation of the real image height  
(in the picture) from the ideal image height. The  
relative distortion is the percentage deviation.  
The ideal image height results from the object  
height and the magnification. The image height of  
21.6mm is the radial distance between the edge and  
the middle of the image field for the format 24mm x  
36mm. The graph of the effective distortion illustra-  
tes the appearance of straight horizontal and verti-  
cal lines in the picture.  
Vignetting  
[%]  
100  
5.6  
4.0  
2.5  
80  
60  
40  
20  
Vignetting is a continous decrease of the illumina-  
tion to the edges of the image field. The graph  
shows the percentage loss of illumination over the  
image height. 100% means no vignetting.  
0
0
5
10  
15  
20  
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LEICA SUMMARIT-M 75 mm f/2.5  
5
Depth of field table  
Aperture Stop  
5,6  
Magnification  
2,5  
2,8  
4
8
11  
16  
0,9  
1
0,890 - 0,910  
0,987 - 1,013  
1,181 - 1,219  
1,470 - 1,531  
1,946 - 2,057  
2,878 - 3,133  
7,171 - 9,048  
68,25 - ∞  
0,889 - 0,912  
0,986 - 1,015  
1,179 - 1,222  
1,467 - 1,535  
1,940 - 2,064  
2,864 - 3,150  
7,079 - 9,198  
60,68 - ∞  
0,884 - 0,917  
0,980 - 1,021  
1,170 - 1,231  
1,453 - 1,551  
1,915 - 2,093  
2,809 - 3,219  
6,749 - 9,825  
42,59 - ∞  
0,877 - 0,924  
0,972 - 1,030  
1,159 - 1,245  
1,435 - 1,572  
1,883 - 2,133  
2,740 - 3,316  
6,354 - 10,81  
30,46 - ∞  
0,868 - 0,934  
0,960 - 1,043  
1,142 - 1,265  
1,408 - 1,605  
1,837 - 2,195  
2,642 - 3,473  
5,840 - 12,73  
21,34 - ∞  
0,857 - 0,948  
0,946 - 1,061  
1,122 - 1,291  
1,377 - 1,648  
1,783 - 2,279  
2,530 - 3,691  
5,306 - 16,37  
15,54 - ∞  
0,839 - 0,972  
0,924 - 1,091  
1,089 - 1,337  
1,328 - 1,726  
1,700 - 2,434  
2,362 - 4,126  
4,604 - 31,36  
10,70 - ∞  
1/9,92  
1/11,3  
1/13,9  
1/18,0  
1/24,6  
1/38,0  
1/105  
1/∞  
1,2  
1,5  
2
3
8
Aperture Stop 2,5  
0,9  
1
1,2  
1,5  
2
3
8
0
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
Depth of Field [m]  
Aperture Stop 2,8  
0,9  
1
1,2  
1,5  
2
3
8
0
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
Depth of Field [m]  
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LEICA SUMMARIT-M 75 mm f/2.5  
6
Aperture Stop 4  
0,9  
1
1,2  
1,5  
2
3
8
0
0
0
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
7
7
7
8
9
10  
11  
12  
12  
12  
13  
13  
13  
14  
14  
14  
15  
15  
15  
16  
16  
16  
17  
17  
17  
18  
18  
18  
19  
19  
19  
20  
20  
20  
Depth of Field [m]  
Aperture Stop 5,6  
0,9  
1
1,2  
1,5  
2
3
8
8
9
10  
11  
Depth of Field [m]  
Aperture Stop 8  
0,9  
1
1,2  
1,5  
2
3
8
8
9
10  
11  
Depth of Field [m]  
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LEICA SUMMARIT-M 75 mm f/2.5  
7
Aperture Stop 11  
0,9  
1
1,2  
1,5  
2
3
8
0
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
Depth of Field [m]  
Aperture Stop 16  
0,9  
1
1,2  
1,5  
2
3
8
0
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
Depth of Field [m]  
Leica Camera AG / Oskar-Barnack-Straße 11 / D-35606 Solms / Telefon +49 (0) 6442-208-0 / Telefax +49 (0) 6442-208-333  
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