LEICA SUMMARON-M 28 Mm F/5.6

LEICA SUMMARON-M 28 mm f/5.6

Technical Data.

Illustration 1:1

Lens Leica Summaron-M 28 mm f/5.6

Order number 11 6 95

Angle of view For 35 mm (24 x 36 mm): 75°/65°/46° (diagonal, horizontal, vertical)

Optical design Number of elements/groups: 6/4 Position of entrance pupil in front of the bayonet: 2.4 mm Focusing range: 1 m to infinity

Distance setting Scala: combined meter-increments Smallest object field: for 35 mm: 801 x 1201 mm Largest reproduction ratio: 1:33.4

Aperture Setting/type: prefix with click stops, full steps Smallest aperture: f/22 Number of aperture blades: 8

Bayonet Leica M quick-change bayonet

Filter thread E34

Lens hood Clip-on (supplied)

Dimensions and weight Length: approx. 18/39 mm (without/with lens hood) Largest diameter without lens hood: approx. 51 mm (without lens hood) Weight: approx. 165 g (without lens hood)

Page 1 of 6 I As at July 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 SUMMARON-M 28 mm f/5.6

ENGINEERING DRAWING LENS SHAPE

Illustrations 1:1

This Leica Summaron 28 mm f/5.6 is a replica of the model originally introduced in 1955. With its 6 lens elements arranged strictly symmetrically around the aperture in 4 groups, it has the same optical design. Its extremely com- pact mechanical construction also corresponds to the original. Unlike this, however, the current model is equipped with the M bayonet including 6 bit code. Furthermore, various external details have been adapted to the appearance of the current M lenses, for example the shape of the focus unlock button, the diameter of the aperture ring and the knurling. Even when fully open, the lens is characterized by high-contrast rendering in large areas of the field of view. Stopping down to 11 greatly improves the imaging performance in the corners of the picture. Although stopping down further enhances the picture corners even more, this is at the expense of the overall contrast, i.e. the imaging performance is more even overall. When the aperture is open, vignetting is max., i.e. in the image corners, approx. 2.5 aperture stages. By stopping down to 8 vignetting can be reduced to approx. 1.8 aperture stages. Distortion is negligible. Summary: Due to its imaging properties and its focal length, the new edition of the Leica Summaron 28 mm f/5.6 is suitable for quick and discreet photography, in other words spontaneous snapshots. Its extremely small dimen - sions together with the camera make an extremely manageable unit that is easy to carry.

Page 2 of 6 I As at July 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 Summaron-M 1:5.6/28mm Brennweite 28 mm

Blende 5.6 Vignettierung [%] [%] 100 100

80 80 11.0 8.0 5.6 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 8.0 Relative Verzeichnung [%] [%] 100 5 4 80 3 2 60 1 0 LEICA SUMMARON-M 28 mm40 f/5.6 -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 Summaron-M 1:5.6/28mm Brennweite 28 mm Y' [mm] Y'[mm]

ApertureBlende Stop 5.6 5.6 VignettierungApertureBlende Stop 11.0 11.0 Effektive Verzeichnung [%] [%] [%] 100 100 100 Y'[mm]

80 80 80 11.0 8.0 12 5.6 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 8.0 8.0 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 11.0 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 8.0 and 11.0 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 6 I As at July 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 Summaron-M 1:5.6/28mm Brennweite 28 mm

Blende 5.6 Vignettierung [%] [%] 100 100

80 80 11.0 8.0 5.6 60 60

40 40

20 20

0 0 0 3 6 9 12 15 18 21 0 3 6 9 12 15 18 21 Summaron-M 1:5.6/28mm Brennweite 28 mm Y'[mm] Y'[mm]

Blende 5.6 VignettierungBlende 8.0 Relative Verzeichnung [%] [%] [%] [%] 100 100100 5 4 80 80 80 11.0 3 8.0 5.6 2 60 60 60 1 0 40 40 40 -1 LEICA SUMMARON-M 28-2 mm f/5.6 20 20 20 -3 -4 0 0 0 -5 0 3 6 9 12 15 Distortion18 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 8.0 RelativeRelative BlendeVerzeichnung Distortion 11.0 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 11.0 Effektive Verzeichnung [%] 100 Y'[mm] VIGNETTING 80 Summaron-M 1:5.6/28mm Brennweite 28 mm 12

60 Blende 5.6 Vignettierung [%] 9[%] 100 100 40 6 80 80 11.0 8.0 20 3 5.6 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 8.0 Relative Verzeichnung [%] [%] 100 5 4 80 3 2 Distortion Distortion 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 between0 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 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 6 I As at July 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 11.0 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 SUMMARON-M 28 mm f/5.6

Depth of field table

ApertureAperture Stop Stop MagnificationMagnification Aperture Stop Magnification 5.65.6 8.08.0 11.011.0 16.0 22.022.0 5.6 8.0 11.0 16.0 22.0 11 0.819 0.819 - 1.290 - 1.290 0.765 0.765 - - 1.457 1.457 0.704 0.704 - - 1.763 1.763 0.622 - - 2.729 2.729 0.546 0.546 - - 8.185 8.185 1/33.4 1/33.4 1 0.819 - 1.290 0.765 - 1.457 0.704 - 1.763 0.622 - 2.729 0.546 - 8.185 1/33.4 1.11.1 0.884 0.884 - 1.464 - 1.464 0.821 0.821 - - 1.685 1.685 0.750 0.750 - - 2.111 2.111 0.657 - - 3.680 3.680 0.573 0.573 - - 38.45 38.45 1/36.9 1/36.9 1.1 0.884 - 1.464 0.821 - 1.685 0.750 - 2.111 0.657 - 3.680 0.573 - 38.45 1/36.9 1.21.2 0.946 0.946 - 1.649 - 1.649 0.874 0.874 - - 1.937 1.937 0.794 0.794 - - 2.527 2.527 0.690 - - 5.186 5.186 0.598 0.598 - - ∞ ∞ 1/40.5 1/40.5 1.2 0.946 - 1.649 0.874 - 1.937 0.794 - 2.527 0.690 - 5.186 0.598 - ∞ 1/40.5 1.51.5 1.120 1.120 - 2.287 - 2.287 1.020 1.020 - - 2.889 2.889 0.912 0.912 - - 4.457 4.457 0.776 - - 51.98 51.98 0.660 0.660 - - ∞ ∞ 1/51.1 1/51.1 1.5 1.120 - 2.287 1.020 - 2.889 0.912 - 4.457 0.776 - 51.98 0.660 - ∞ 1/51.1 1.71.7 1.226 1.226 - 2.796 - 2.796 1.106 1.106 - - 3.757 3.757 0.980 0.980 - - 6.958 6.958 0.824 - - ∞ ∞ 0.694 0.694 - - ∞ ∞ 1/58.2 1/58.2 1.72 1.226 1.373 - 2.796 - 3.730 1.106 1.223 - - 3.757 5.678 0.980 1.070 - - 6.958 18.87 0.824 0.886 - ∞ ∞ 0.736 0.694 - - ∞ ∞ 1/68.8 1/58.2 2 1.373 - 3.730 1.223 - 5.678 1.070 - 18.87 0.886 - ∞ 0.736 - ∞ 1/68.8 22.5 1.373 1.587 - 3.730 - 6.001 1.223 1.390 - - 5.678 13.50 1.070 1.194 - - 18.87 ∞ 0.886 0.968 - ∞ ∞ 0.791 0.736 - - ∞ ∞ 1/86.5 1/68.8 2.5 1.587 - 6.001 1.390 - 13.50 1.194 - ∞ 0.968 - ∞ 0.791 - ∞ 1/86.5 2.53 1.587 1.772 - 6.001 - 10.10 1.390 1.529 - - 13.50 164.7 1.194 1.294 - - ∞ ∞ 0.968 1.032 - ∞ ∞ 0.833 0.791 - - ∞ ∞ 1/104.2 1/86.5 3 1.772 - 10.10 1.529 - 164.7 1.294 - ∞ 1.032 - ∞ 0.833 - ∞ 1/104.2 Distance Setting [m] 5 2.310 - ∞ 1.910 - ∞ 1.555 - ∞ 1.190 - ∞ 0.931 - ∞ 1/175.1

Distance Setting [m] 3 1.772 - 10.10 1.529 - 164.7 1.294 - ∞ 1.032 - ∞ 0.833 - ∞ 1/104.2 5 2.310 - ∞ 1.910 - ∞ 1.555 - ∞ 1.190 - ∞ 0.931 - ∞ 1/175.1 Distance Setting [m] 57 2.310 2.656 - - ∞ ∞ 1.910 2.139 - - ∞ ∞ 1.555 1.702 - - ∞ ∞ 1.190 1.273 - ∞ ∞ 0.980 0.931 - - ∞ ∞ 1/246 1/175.1 710 2.656 2.991 - - ∞ ∞ 2.139 2.351 - - ∞ ∞ 1.702 1.832 - - ∞ ∞ 1.2731.343 - - ∞ ∞ 1.021 0.980 - - ∞ ∞ 1/352.2 1/246 7 2.656 - ∞ 2.139 - ∞ 1.702 - ∞ 1.273 - ∞ 0.980 - ∞ 1/246 1020 2.991 3.508 - - ∞ ∞ 2.351 2.657 - - ∞ ∞ 1.832 2.011 - - ∞ ∞ 1.3431.436 - - ∞ ∞ 1.073 1.021 - - ∞ ∞ 1/706.5 1/352.2 1020∞ 2.9913.508 4.242 - - ∞ ∞ 2.3512.657 3.054 - - ∞ ∞ 1.8322.011 2.230 - - ∞ ∞ 1.3431.436 1.542 - - ∞ ∞ 1.130 1.0211.073 - - ∞ ∞ 1/∞1/352.21/706.5 20∞ 3.5084.242 - ∞ 2.6573.054 - ∞ 2.0112.230 - ∞ 1.4361.542 - ∞ 1.0731.130 - ∞ 1/706.5 1/∞ ∞ 4.242 - ∞ 3.054 - ∞ 2.230 - ∞ 1.542 - ∞ 1.130 - ∞ 1/∞ Aperture Stop 5.6 Aperture Stop 5.6 1 Aperture Stop 5.6 1 1.1 1.11 1.2 1.11.2 1.5 1.7 1.21.5 2 1.51.7 2.5 1.7 2 3 2 2.5 5 2.5 3 7

35[m] Setting Distance 10 57 20 Distance Setting [m] Setting Distance 107 ∞ Distance Setting [m] Setting Distance 1020 20∞ 012345678910 ∞ Depth of Field [m] 012345678910 012345678910Depth of Field [m] Depth of Field [m] Aperture Stop 8

1 Aperture Stop 8 1.1 Aperture Stop 8 1.2 1 1.5 1 1.1 1.7 1.11.2 2 1.21.5 2.5 1.51.7 3 1.72 5 2.52 7 2.53[m] Setting Distance 10 35 20 57 ∞ Distance Setting [m] Setting Distance 107 Distance Setting [m] Setting Distance 1020 012345678910 20∞ Depth of Field [m] ∞ 012345678910 012345678910Depth of Field [m] Depth of Field [m]

Page 5 of 6 I As at July 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 SUMMARON-M 28 mm f/5.6

Aperture Stop 11 Aperture Stop 11 Aperture Stop 11 1 1.11 1 1.11.2 1.1 1.21.5 1.2 1.51.7 1.5 1.72 1.7 2.52 2 2.53 2.5 35 3 57

Distance Setting [m] Setting Distance 5 107 Distance Setting [m] Setting Distance 107 Distance Setting [m] Setting Distance 20 10 20∞ 20∞ ∞ 0 1 2 3 4 5 6 7 8 9 1011121314151617181920 0 1 2 3 4 5 6 7 8Depth 9 1011121314151617181920of Field [m] 0 1 2 3 4 5 6 7 8 9 1011121314151617181920 Depth of Field [m] Depth of Field [m]

Aperture Stop 16 Aperture Stop 16 Aperture Stop 16 1 1.11 1 1.11.2 1.1 1.21.5 1.2 1.51.7 1.5 1.72 1.7 2.52 2 2.53 2.5 35 3 57 5 107 7 1020 10 Eingestellte Entfernung [m] Entfernung Eingestellte 20∞ 20 Eingestellte Entfernung [m] Entfernung Eingestellte ∞ Eingestellte Entfernung [m] Entfernung Eingestellte ∞ 0 1 2 3 4 5 6 7 8 9 1011121314151617181920 0 1 2 3 4 5 6 7 8Schärfentiefe 9 1011121314151617181920 [m] 0 1 2 3 4 5 6 7 8 9 1011121314151617181920 Schärfentiefe [m] Schärfentiefe [m]

Aperture Stop 22 Aperture Stop 22 Aperture Stop 22 1 1.11 1 1.11.2 1.1 1.21.5 1.2 1.51.7 1.5 1.72 1.7 2.52 2 2.53 2.5 35 3 57

Page 6 of 6 I As at July 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