Leica 11141 Manuel D’Utilisation
LEICA SUPER ELMAR-M 21mm f/3.4 ASPH.
Distortion
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 magnifica-
tion. The image height of 21.6 mm is the radial distance
between the edge and the middle of the image field for
the 24 mm x 36 mm format. The graph of the effective
distortion illustrates the appearance of straight horizon-
tal and vertical lines in the picture.
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 magnifica-
tion. The image height of 21.6 mm is the radial distance
between the edge and the middle of the image field for
the 24 mm x 36 mm format. The graph of the effective
distortion illustrates the appearance of straight horizon-
tal and vertical lines in the picture.
Vignetting is a continous decrease of the illumination to-
wards the edges of the image field. The graph shows the
percentage lost of illumination over the image height.
100% means no vignetting.
wards the edges of the image field. The graph shows the
percentage lost of illumination over the image height.
100% means no vignetting.
Vignetting
4
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
[%]
Blende 2,0
Apo-Summicron-M 1:2,0/50mm ASPH.
Brennweite 50 mm
0
3
6
9
12
15
18
21
Y' [mm]
0
20
40
60
80
100
[%]
Blende 2,8
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
Blende 5,6
[%]
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
[%]
Vignettierung
2,0
2,8
5,6
0
3
6
9
12
15
18
21
Y'[mm]
-5
-4
-3
-2
-1
0
1
2
3
4
5
[%]
Relative Verzeichnung
0
3
6
9
12
15
18
X'[mm]
0
3
6
9
12
Y'[mm]
Effektive Verzeichnung
Relative Distortion
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
[%]
Blende 2,0
Apo-Summicron-M 1:2,0/50mm ASPH.
Brennweite 50 mm
0
3
6
9
12
15
18
21
Y' [mm]
0
20
40
60
80
100
[%]
Blende 2,8
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
Blende 5,6
[%]
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
[%]
Vignettierung
2,0
2,8
5,6
0
3
6
9
12
15
18
21
Y'[mm]
-5
-4
-3
-2
-1
0
1
2
3
4
5
[%]
Relative Verzeichnung
0
3
6
9
12
15
18
X'[mm]
0
3
6
9
12
Y'[mm]
Effektive Verzeichnung
Effective Distortion
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
[%]
Blende 2,0
Apo-Summicron-M 1:2,0/50mm ASPH.
Brennweite 50 mm
0
3
6
9
12
15
18
21
Y' [mm]
0
20
40
60
80
100
[%]
Blende 2,8
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
Blende 5,6
[%]
0
3
6
9
12
15
18
21
Y'[mm]
0
20
40
60
80
100
[%]
Vignettierung
2,0
2,8
5,6
0
3
6
9
12
15
18
21
Y'[mm]
-5
-4
-3
-2
-1
0
1
2
3
4
5
[%]
Relative Verzeichnung
0
3
6
9
12
15
18
X'[mm]
0
3
6
9
12
Y'[mm]
Effektive Verzeichnung
LEICA APO-SUMMICRON-M 50 mm f/2 ASPH.
f/5.6
f/2.8
f/2.8
f/2.0