LEICA SUMMARIT-M 50 mm f/2.4

Technical Data.

Illustration 1:1

Lens Leica Summarit-M 50 mm f/2.4

Order number Black anodized: 11 680 Silver anodized: 11 681

Angle of view For 35 mm (24 x 36 mm): 47°/40°/27°; (diagonal, horizontal, vertical) for M8 (18 x 27 mm): 36°/30°/20°, equivalent focal length of approx. 67 mm

Optical design Number of elements/groups: 6/4 Position of entrance pupil in front of the bayonet: 2.3 mm Focusing range: 0.8 m to infinity

Distance setting Scala: combined meter/feet-increments Smallest object field: for 35 mm: 388 x 507 mm, for M8: 253 x 380 mm Largest reproduction ratio: 1:14.1

Aperture Setting/type: click stops, half steps Smallest aperture: f/16 Number of aperture blades: 9

Bayonet Leica M quick-change bayonet

Filter thread E46

Lens hood Screw-on

Dimensions and weight Length: approx. 33 mm (without lens hood) Largest diameter: approx. 52 mm Weight: approx. 105 g/190 g (without/with lens hood)

Page 1 of 8 I As at March 2016 I Specifications are subject to change without notice Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLAR I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com LEICA SUMMARIT-M 50 mm f/2.4

ENGINEERING DRAWING LENS SHAPE

Illustrations 1:1

Powerful, lightweight and designed to be easy to operate, the Leica Summarit-M 50 mm f/2.4’s applications are as varied as life itself. It corresponds closely to the field of vision and viewing patterns of the human eye and offers an impressively neutral and natural perspective. The 50 mm Summarit-M is tailor-made for everyday photography. Its lens speed is perfectly adapted for all common applications. It is an updated double-Gauss six-element construction based on our tried and tested design. All of this means that this particular Summarit-M makes the Leica M easier to experi ence than ever before, without cutting any corners in terms of optical performance.

Page 2 of 8 I As at March 2016 I Specifications are subject to change without notice Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLAR I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com Summarit-M 1:2,4/50mm Brennweite 50 mm

Blende 2.4 Vignettierung [%] [%] 100 100

80 80 5.6 4.0 2.4 60 60

40 40

20 20

0 0 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 Y'[mm] Y'[mm]

Blende 4.0 Relative Verzeichnung [%] [%] 100 5 4 80 3 2 60 1 0 LEICA SUMMARIT-M 50 mm40 f/2.4 -1 -2 20 -3 -4 MTF DIAGRAMS 0 -5 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 Summarit-M 1:2,4/50mm Brennweite 50 mm Y' [mm] Y'[mm]

ApertureBlende Stop 2.4 2.4 VignettierungApertureBlende Stop 5.6 5.6 Effektive Verzeichnung [%] [%] [%] 100 100 100 Y'[mm]

80 80 80 5.6 4.0 12 2.4 60 60 60 9

40 40 40 6

20 20 20 3

0 0 0 0 0 3 6 9 12 15 18 21 0 3 06 39 612 915 1218 1521 18 21 0 3 6 9 12 15 18 Y'[mm] Y'[mm] Y'[mm] X'[mm]

ApertureBlende Stop 4.0 4.0 Relative Verzeichnung [%] [%] 100 5 4 80 3 2 60 1 0 40 -1 -2 20 -3 Sagittal structures -4 0 -5 Tangential structures 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 Y' [mm] Y'[mm]

Blende 5.6 Effektive Verzeichnung [%] 100 Y'[mm]

80 12

60 9

40 6

20 3

MTF GRAPHS The MTF is shown in each case for the maximum aperture and the aperture value 4.0 and 5.6 for long focusing distances (infinity). The0 contrast is plotted for 5, 10, 20, 40 lines/mm for the height of0 the format for tangential (dashed line) and sagittal structures (continuous0 line)3 for6 white light.9 The12 plots15 for 5 and18 10 lines/mm21 provide0 an impression3 6 of the9 contrast12 performance15 18 for coarser object structures and the 20 and 40 lines/mm plots documentY'[mm] the resolving power for fine and finest object structures. X'[mm]

Page 3 of 8 I As at March 2016 I Specifications are subject to change without notice Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLAR I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com Summarit-M 1:2,4/50mm Brennweite 50 mm

Blende 2.4 Vignettierung [%] [%] 100 100

80 80 5.6 4.0 2.4 60 60

40 40

20 20

0 0 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 Summarit-M 1:2,4/50mm Brennweite 50 mm Y'[mm] Y'[mm]

Blende 2.4 VignettierungBlende 4.0 Relative Verzeichnung [%] [%] [%] [%] 100 100100 5 4 80 80 80 5.6 3 4.0 2.4 2 60 60 60 1 0 40 40 40 -1 LEICA SUMMARIT-M 50 mm-2 f/2.4 20 20 20 -3 -4 0 0 0 -5 Distortion 0 3 6 9 12 15 18 21 0 0 3 3 6 6 9 9 12 1215 1518 1821 21 0 3 6 9 12 15 18 21 Y'[mm] Y'[mm]Y' [mm] Y'[mm]

Blende 4.0 RelativeRelative BlendeVerzeichnung Distortion 5.6 EffektiveEffective Verzeichnung Distortion [%] [%] [%] 100 5100 4 Y'[mm] 80 3 80 2 12 60 1 60 9 0 40 -1 40 6 -2 20 -3 20 3 -4 0 -5 0 0 0 3 6 9 12 15 18 21 0 0 3 3 6 6 9 9 12 1215 1518 1821 21 0 3 6 9 12 15 18 Y' [mm] Y'[mm]Y'[mm] X'[mm]

Blende 5.6 Effektive Verzeichnung [%] 100 Y'[mm] VIGNETTING 80 Summarit-M 1:2,4/50mm Brennweite 50 mm 12

60 Blende 2.4 Vignettierung [%] 9[%] 100 100 40 6 80 80 5.6 4.0 20 3 2.4 60 60 0 0 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 40 40 Y'[mm] X'[mm]

20 20 Sagittal structures

0 0 Tangential structures 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 Y'[mm] Y'[mm]

Blende 4.0 Relative Verzeichnung [%] [%] 100 5 4 80 3

Distortion Distortion2 is the deviation of the real image height (in the picture) from the ideal image height. The relative distortion is the percentage 60 deviation.1 The ideal image height results from the object height and the magnification. The image height of 21.6 mm is the radial distance between the edge and the middle of the image field for the format 24 mm x 36 mm. The graph of the effective distortion illustrates the 0 appearance of straight horizontal and vertical lines in the picture. 40 -1 VIGNETTING Vignetting-2 is a continous decrease of the illumination to the edges of the image field. The graph shows the percentage loss of illumination over the image height. 100 % means no vignetting. 20 -3 -4 0 -5 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 Page 4 of 8 I As at March 2016 I Specifications are subject to change without notice Y' [mm] Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLARY'[mm] I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com

Blende 5.6 Effektive Verzeichnung [%] 100 Y'[mm]

80 12

60 9

40 6

20 3

0 0 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 Y'[mm] X'[mm] LEICA SUMMARIT-M 50 mm f/2.4

Depth of field table

Aperture Stop Magnification 2.4 2.8 4.0 5.6 8.0 11.0 16.0 0.8 0.782 - 0.819 0.779 - 0.822 0.770 - 0.832 0.759 - 0.846 0.743 - 0.867 0.724 - 0.895 0.694 - 0.947 1/14.1 1 0.972 - 1.03 0.967 - 1.04 0.953 - 1.05 0.936 - 1.07 0.911 - 1.11 0.882 - 1.16 0.837 - 1.25 1/18.1 1.2 1.16 - 1.24 1.15 - 1.25 1.13 - 1.28 1.11 - 1.31 1.07 - 1.36 1.03 - 1.44 0.970 - 1.58 1/22.1 1.5 1.44 - 1.57 1.42 - 1.58 1.39 - 1.62 1.36 - 1.68 1.30 - 1.77 1.24 - 1.90 1.15 - 2.16 1/28.1 2 1.89 - 2.13 1.87 - 2.15 1.82 - 2.23 1.75 - 2.33 1.66 - 2.51 1.56 - 2.78 1.42 - 3.39 1/38.1 3 2.75 - 3.31 2.71 - 3.36 2.60 - 3.55 2.47 - 3.83 2.29 - 4.35 2.11 - 5.23 1.86 - 7.93 1/58.1

Distance Setting [m] Setting Distance 5 4.33 - 5.92 4.23 - 6.11 3.97 - 6.76 3.67 - 7.87 3.29 - 10.4 2.92 - 17.7 2.46 - ∞ 1/98.1 ∞ 31.7 - ∞ 27.2 - ∞ 19.1 - ∞ 13.6 - ∞ 9.54 - ∞ 6.95 - ∞ 4.78 - ∞ 1/∞

Aperture Stop 2,4

0,8

1

1,2

1,5

2 Distance Setting [m] Setting Distance 3

5

∞

0123456 Depth of Field [m]

Page 5 of 8 I As at March 2016 I Specifications are subject to change without notice Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLAR I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com LEICA SUMMARIT-M 50 mm f/2.4

Aperture Stop 2,8

0,8

1

1,2

1,5

2 DistanceSetting [m] 3

5

∞

01234567 Depth of Field [m]

Aperture Stop 4,0

0,8

1

1,2

1,5

2 DistanceSetting [m] 3

5

∞

01234567 Depth of Field [m]

Page 6 of 8 I As at March 2016 I Specifications are subject to change without notice Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLAR I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com LEICA SUMMARIT-M 50 mm f/2.4

Aperture Stop 5,6

0,8

1

1,2

1,5

2 Distance Setting [m] Setting Distance 3

5

∞

012345678 Depth of Field [m]

Aperture Stop 8,0

0,8

1

1,2

1,5

2 DistanceSetting[m] 3

5

∞

012345678910 Depth of Field [m]

Page 7 of 8 I As at March 2016 I Specifications are subject to change without notice Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLAR I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com LEICA SUMMARIT-M 50 mm f/2.4

Aperture Stop 11

0,8

1

1,2

1,5

2 Distance Setting Setting [m]Distance 3

5

∞

012345678910 Depth of Field [m]

Aperture Stop 16

0,8

1

1,2

1,5

2 DistanceSetting [m] 3

5

∞

012345678910 Depth of Field [m]

Page 8 of 8 I As at March 2016 I Specifications are subject to change without notice Leica Camera AG I Am Leitz-Park 5 I 35578 WETZLAR I GERMANY I Telephone +49(0)6441-2080-0 I Fax +49(0)6441-2080-333 I www.leica-camera.com