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LEICA APO-SUMMICRON-M 50 mm f/2ASPH. ASPH. SUPER ELMAR-M 21mm f/3.4

More than 30 years after the launch of Summicron-M 1:2/50 mm, which is still available, the Leica APO Summicron-M 1:2/50 mm ASPH. represents a totally new development. With its compact body - only marginally longer and slightly heavier than the Summicron-M 1:2/50 mm, and with an almost identical diameter, it provides visibly higher image quality. On the Leica APO Summicron-M 1:2/50 mm ASPH. the exceptional correction enables all aberrations to be reduced to a minimum level that is negligible in digital photography. Its key features include excellent contrast rendition, all the way to the corners of the image, even with a fully open aperture. The use of a „floating element“ ensures that this is retained, even for close-up shots. Vignetting is limited to a maximum - i.e. in the corners of the image - of just 2 stops at full aperture in 35 mm format, or around 1 on the Leica M8 models. Stopping down to 2.8 visibly reduces this light deterioration towards the edge of the image, with practically only the natural vignetting remaining. Distortion is very low at a maximum of just 0.4 % (pin cushoin), which is practically imperceptible. A total of eight lens elements are used to achieve this exceptional performance. To realize the apochromatic correction (resulting in a common focusing plane for three light wavelengths), three are made of glass types with high anomalous partial color dispersion, while two of the others have a high refractive index. The aspherical surface of the first lens in the rear group helps to reduce spherical aberration and flatten the image field. While the optical construction in front of the aperture is a Gaussian type, the arrangement of the lens elements behind it is similar to that in the Summilux-M 1:1.4/35 mm ASPH. This group comprises a „floating element“, which is moved independently of the rest of the construction during focusing. Summary: The Leica APO Summicron-M 1:2/50 mm ASPH. delivers exceptional picture quality and sets new standards in 35 mm digital photography.

Optical design

Aspherical surface Asphäre

Floating FloatingElement Element

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LEICA APO-SUMMICRON-M 50 mm f/2ASPH. ASPH. SUPER ELMAR-M 21mm f/3.4

Engineering drawing

Technical Data Angle of view (diagonal, horizontal, vertical) Optical design

47° / 40° / 27° (With Leica M8 models: 36° / 30° / 20°) Number of lenses/groups: 8 / 5 Position of entrance pupil (from bayonet flange): 24.4 mm Focus range: 0.7 m to ∞

Distance setting

Aperture

Scales: Combined meter / graduation Smallest object field: approx. 271 mm x 407 mm (With Leica M8 models: 203 mm x 305 mm) Largest reproduction ratio: approx. 1:11.3 Setting / Function: prefix with click-stops, half steps Lowest value: 16

Bayonet

Leica M quick-change bayonet

Lens hood

Built-in, extendable by rotating

Filter mount Dimensions and weight

Female thread for screw-on E39 filters, non-rotating Length: approx. 47 mm

Largest diameter: approx. 53 mm

Weight: approx. 300 g

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Apo-Summicron-M 1:2,0/50mm AS Blende 2,0

[%] Brennweite 50 mm Apo-Summicron-M 1:2,0/50mm ASPH. 100

[%] 100

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LEICA APO-SUMMICRON-M 50 mm f/2ASPH. ASPH. SUPER ELMAR-M 21mm f/3.4 Vignettierung Blende 2,0 [%] 100

[%] 100

80

80

60

60

60

40

40

20

20

0

40 MTF-graphs 20

3

6 Blende 9f/2.0 12 2,0

15

18

21

Y'[mm] Blende 2,8

80 [%] 100 60 80 40 60 20 40 0 20 0

3

6

9

12

15

18 21 Y'[mm]

3

6 Blende 9 2,8 12

15

18 21 Y' [mm]

0 0 [%] 100

f/5.6 Blende 5,6

80 [%] 100 60 80 40 60 20 40 0 20 0

3

6

9

12

15

18 21 Y' [mm]

3

6 Blende 9 5,6 12

15

18

0 0 [%] 100

21

Y'[mm]

0 [%] 100

3

0 3

6

9

12

6 Vignettierung 9 Aperture 12 15Stop 185.6 21 f/2.8 Blende 2,8 [%] Y'[mm] 100

12 9 6

20

3

0

0 0

3

6

9

12

15

18 21 Y'[mm]

18

0

21

3

Y'[mm]

5 4 3 2 1 0 -1 -2 -3 -4 -5

[%]

Relative Verzeichnung 5,6 80 [%] 80 5 2,8 2,0 4 60 60 3 2 40 40 1 0 20 20 -1 -2 0 0 -3 0 3 6 0 9 3 12 6 15 9 18 12 21 15 18 21 0 3 -4 Y'[mm] Y' [mm] -5 0 3 6 9 Verzeichnung 12 15 18 21 Relative Blende 5,6 [%] [%] Y'[mm] 5 100 4 Y'[mm] Effektive Verzeichnung 3 80 The MTF is indicated at full aperture, at f/2,8 and f/5,612 2 Y'[mm]at long taking distances (infinity). Shown is the contrast 1 60 in percentage for 5, 10, 20 and 40 lp/mm accross the9 0 12 height of the 35 mm film format, for tangential (dotted -1 40 sagittal (solid line) structures, in white light. line) and 6 -2 9 The 5 and 10 lp/mm will give an indication regarding -3 the contrast ratio for large object structures. The 203 20 6 and 40 lp/mm records the resolution of finer and finest -4 object structures. -5 0 0 30 3 6 0 9 3 12 6 15 9 18 12 21 15 18 21 0 3 tangential structures Y'[mm] Y'[mm] 0 sagittal structures 0 3 Effektive 6 9 Verzeichnung 12 15 18 X'[mm]

80

40

15

Brennweite 50 mm

Y'[mm]

60

40 20

0

0 [%] 100

60

5,6 2,8 2,0

0

Apo-Summicron-M 1:2,0/50mm ASPH. 0

80

80

0

3

6

9

12

15

18 X'[mm]


cron-M 1:2,0/50mm ASPH.

Y'[mm]

Blende 2,8

Vignettierung [%] 100

[%] 100

Y'[mm]

Brennweite 50 mm

5 4 3 2 1 0 -1 -2 -3 -4 -5

Relative Verzeichnung

[%]

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LEICA APO-SUMMICRON-M 50 mm f/2ASPH. ASPH. SUPER ELMAR-M 21mm f/3.4 80

80

15

18 21 Y'[mm]

60

60

40

40

20

20

Distortion 0 0

5 4 3 2 1 0 -1 -2 -3 -4 -5 15

0 3

09

6

312

615

918 12 21 15 Y'[mm]

18 21 Y' [mm]

0

3

Relative Distortion Blende 5,6 Relative [%] Verzeichnung 100

[%]

18 21 Y' [mm]

5,6 2,8 2,0

6

9

12

15

18 21 Y'[mm]

Effective EffektiveDistortion Verzeichnung Y'[mm]

80 12 60

9

40

6

20

3 0

0 0

3

6

09

312

615

21 15 918 12 Y'[mm]

18 21 Y'[mm]

0

3

6

9

12

15

18 X'[mm]

Effektive Verzeichnung Y'[mm] 12 Vignetting 9

6

cron-M 1:2,0/50mm ASPH.

Brennweite 50 mm

3

15

18 21 Y'[mm]

[%] 0 100 0

Vignettierung

3

6

9

12

15

80

18 X'[mm]

60 40

f/5.6 5,6 f/2.8 2,8 f/2.0 2,0

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 21.6 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 horizontal and vertical lines in the picture.

20 0 15

18 21 Y'[mm]

0

5 4 3 2 1 0 -1

[%]

3

6

9

12

15

Relative Verzeichnung

18 21 Y'[mm]

Vignetting is a continous decrease of the illumination towards the edges of the image field. The graph shows the percentage lost of illumination over the image height. 100% means no vignetting.


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LEICA APO-SUMMICRON-M 50 mm f/2ASPH. ASPH. SUPER ELMAR-M 21mm f/3.4 Depth of field table

Blende Aperture Stop 2,8

0,690 -

0,710

0,686 -

0,714

0,681 -

0,721

0,673 -

0,8

0,787 -

0,814

0,782 -

0,819

0,774 -

0,828

0,764 -

1

0,979 -

1,023 2,0 1,233 0,690 1,554 0,787 2,099 0,979 3,233 1,169 5,694 1,4502,0 ∞ 0,690 1,910 0,787 -2,799

0,971 -

1,032 2,8 1,247 0,686 1,575 0,782 2,139 0,971 3,332 1,157 6,016 1,4322,8 ∞ 0,686 1,878 0,782 -2,729

0,958 -

1,046 4,0 1,268 0,681 1,610 0,774 2,205 0,958 3,499 1,139 6,591 1,4044,0 ∞ 0,681 1,830 0,774 -2,627

0,943 -

1,2

3 5

Eingestellte Entfernung [m]

1,169 0,7 1,450 0,8 1,910 1 2,799 1,2 4,458 1,5 40,20 0,7 2

-

0,8 3 51 1,2 ∞ 1,5

0,979 -4,458 1,169 -40,20 1,450 -

1,157 0,710 1,432 0,814 1,878 1,023 2,729 1,233 4,280 1,554 29,05 0,710 2,099 0,814 3,233 1,023 5,694 1,233 ∞ 1,554

0,971 -4,280 1,157 -29,05 1,432 -

1,139 0,714 1,404 0,819 1,830 1,032 2,627 1,247 4,032 1,575 20,36 0,714 2,139 0,819 3,332 1,032 6,016

8,0 0,729

1,117 0,721 1,370 0,828 1,771 1,046 2,503 1,268 3,743 1,610 14,55 0,721 2,205

0,743

0,649 -

0,760

0,629 -

0,792

1/11,3

0,858

0,733 -

0,882

0,706 -

0,926

1,096 8,0 1,345 0,662 1,739 0,750 2,459 0,920 4,201 1,085 9,690 1,3218,0 ∞ 0,662 1,688 0,750 -2,338

0,894 -

1/13,2 Vergrößerung 1/17,1

---

0,840 3,749 1,065 7,556

--

1,297 ∞ 1,659

0,920 -3,381 1,085 -10,20 1,321 -

1,247 ∞ 1,575

1,771 -

2,300

1,688 2,338 3,381 -

1,910 -

2,099

1,878 -

2,139

1,830 -

3

2,799 -

3,233

2,729 -

3,332

2,627 -

Aperture Stop Blende 2,0 3,499 2,503 - 2,0 3,749

0.8 5

4,458 -

5,694

4,280 -

6,016

4,032 -

6,591

40,20 0.7

1 1.2 1.5 2 3 5 ∞

29,05 -

20,36 -

0.8

0

2,459

1,595 -

2,693

1,462 -

3,203

1/36,5

4,201

2,161 -

4,950

1,919 -

7,055

1/55,8

9,690

3,017 -

15,01

2,560 -

185,1

1/94,5

7,435 -

5,128 -

5 1.5

1

2

3

4

5

6

3 1

2

3

4

5

6

4

5

6

Depth of Field[m] [m] Schärfentiefe

Blende 2,8

1

2

3

Blende 2,8

Aperture Aperture Stop 2.8 BlendeStop 2,8 2,8

0.8

Eingestellte Entfernung [m] Distance Setting [m] Eingestellte Entfernung [m]

Schärfentiefe [m]

∞2

0.7

0

1/21 1/∞ 1/26,8

1,409 ∞ 1,850

3 1.2

0.8

1,531 ∞ 2,071

1,264 -

Schärfentiefe [m]

1

1/13,2 1/55,8 1/17,1 1/94,5

21

0

1.2

0,926 7,055 1,214 185,1

1.5 0.8

0.7

5

0,882 4,950 1,137 15,01

0,853 -2,560 0,991 -5,128 1,181 -

1,345 ∞ 1,739

10,20 -

0,733 -2,161 0,894 -3,017 1,047 -7,435

1/21 0,792 1/11,3 1/26,8 0,926 1/13,2 1/36,5 1,214 1/17,1 1/55,8Vergrößerung 1,531 1/21 1/94,5 2,071 1/26,8 1/∞ 0,792 1/11,3 3,203 1/36,5

1.2 0.7

3

0,858 4,201 1,096 9,690

1,214 16,0 1,531 0,629 2,071 0,706 3,203 0,853 7,055 0,991 185,1 1,18116,0 ∞ 0,629 1,462 0,706 -1,919

Blende 2,0

0

2

14,55 -

7,556

1,047 0,743 1,264 0,858 1,595 1,096 2,161 1,345 3,017 1,739 7,435 0,743 2,459

1,137 0,853 11,0 1,409 0,991 0,649 - 0,760 1,850 1,181 0,733 - 0,882 2,693 1,462 0,894 - 1,137 4,950 1,919 1,047 - 1,409 15,01 2,560 1,26411,0 - 1,850 ∞ - 5,128 0,649 0,760 1,595 - 2,693

1

5

1.5

3,743 -

16,0

0,662 -

0,828 2,503 0,764 3,499 0,958 -- Blende 1,0462,0 3,743 0,943 4,032 6,591 1,139 -- 1,268 1,117 20,36 ∞ 14,55 1,404 - 1,610 1,370 2,205

11,0

0,840 0,750 Blende 1,065 0,920 5,6 1,297 1,085 0,673 - 0,729 1,659 1,321 0,764 - 0,840 2,300 1,688 0,943 - 1,065 3,749 2,338 Blende 1,117 - 1,297 7,556 3,381 5,6 1,370 - 1,659 ∞ - 10,20 0,673 0,729 1,771 - 2,300

0.7 2

Eingestellte Entfernung Distance [m] [m] Eingestellte Entfernung [m] Setting

2

Eingestellte Entfernung [m] Eingestellte Entfernung [m]

1,5

Vergrößerung Magnification

5,6

4,0

0,7

Eingestellte Entfernung [m]

Distance [m] EingestellteSetting Entfernung [m]

2,0

1 1.2 0.7 1.5 0.8 21 3 1.2 5 1.5

1

2

3

4

5

6

Schärfentiefe [m]

∞2 3 0

1

2

5

3

4

5

6

4

5

6

Schärfentiefe [m]

0

1

2

3

Depth of Field [m] Schärfentiefe [m]

1/∞


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LEICA APO-SUMMICRON-M SUPER ELMAR-M 21mm f/3.4 LEICA 50 mm f/2ASPH. ASPH.

Aperture4,0 Stop 4,0 Blende

0,7

Distance Setting [m] Eingestellte Entfernung [m]Eingestellte Entfernung [m]

0,8 1

Blende 4,0

1,2 1,5 0,7 2 0,8 3 1 5 1,2 ∞ 1,5 2

0

1

2

3

4

5

6

7

4

5

6

7

Depth of Field [m] [m] Schärfentiefe

3 5 ∞

Blende 5,6 0

1

2

3 Schärfentiefe [m]

0,7

Distance Setting [m] [m]Eingestellte Entfernung [m] Eingestellte Entfernung

0,8 1

Aperture5,6 Stop 5,6 Blende

1,2 1,5 0,7 2 0,8 3 1 5 1,2 ∞ 1,5 2

0

1

2

3

3

4

5

6

7

8

5

6

7

8

Schärfentiefe [m]

5 ∞

0

1

2

3

4

Depth of Field [m] Schärfentiefe


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LEICA SUPER APO-SUMMICRON-M 50 mm f/2 ASPH. LEICA ELMAR-M 21mm f/3.4 ASPH.

Aperture Stop 8,0 Blende 8,0

0,7

Blende 8,0

Distance Setting [m] [m] Eingestellte Entfernung Eingestellte [m] Entfernung

0,8 1 0,7 1,2 0,8 1,5 1 2 1,2 3 1,5 5 2 ∞ 3 5 0

1

2

3

4

5

6

7

8

9

10

6

7

8

9

10

6

7

8

9

10

6

7

8

9

10

Depth of Field [m] [m] Schärfentiefe

0

1

2

3

4

5 Schärfentiefe [m]

Blende 11,0

0,7

Aperture Blende Stop 11,011,0

Distance Setting [m] Eingestellte Entfernung Eingestellte [m] Entfernung [m]

0,8 1 0,7 1,2 0,8 1,5 1 2 1,2 3 1,5 5 2 ∞ 3 5 0

1

2

3

4

5 Schärfentiefe [m]

0

1

2

3

4

5

Depth of Field [m] Schärfentiefe [m]


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LEICA APO-SUMMICRON-M 50 mm f/2ASPH. ASPH. SUPER ELMAR-M 21mm f/3.4

Aperture Blende Stop 16,016,0

0,7

Distance Setting [m] [m] Eingestellte Entfernung

0,8 1 1,2 1,5 2 3 5 ∞

0

1

2

3

4

5 Depth of Field [m] Schärfentiefe [m]

6

7

8

9

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Datos Tecnicos APO-Summicron 50  

Datos Tecnicos APO-Summicron 50