Leica Summicron-M 28mm 2.0 ASPH User Manual
LEICA SUMMICRON-M 28 mm f/2 ASPH.
Technical Data.
Illustrations 1:1
Lens Leica Summicron-M 28 mm f/2 ASPH.
Order number 11 672
Angle view
(diagonal, horizontal, vertical)
Optical design Number of elements/groups: 9/6
Distance setting Scala: combined meter-/feet-increments
Diaphragm Setting/type: preset, with click-stops, half values available
Bayonet Leica M quick-change bayonet
Filter thread E46
Lens hood Available, screwable (supplied)
Dimensions and weight Length: approx. 41,4/54 mm (without/with lens hood)
For 35 mm (24 x 36 mm): ca. 74°/65°/46°;
for M8 (18 x 27 mm): 60°/51/35°
Entrance pupil for bayonet: 23,3 mm
Focusing range: 0,7 m to infinity
Smallest object field: for 35 mm: 526 x 789 mm, for M8: 395 x 592 mm
Highest reproduction ratio: 1:21,9
Smallest aperture: f/16
Number of aperture blades: 10
Largest diameter without lens hood: approx. 53 mm
Weight: approx. 257 g/288,9 g (without/with lens hood and covers)
Leica Camera AG
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
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Page 1 of 7 I As at January 2016 I Specifications are subject to change without notice
LEICA SUMMICRON-M 28 mm f/2 ASPH.
ENGINEERING DRAWING LENS SHAPE
Illustrations 1:1
Aspherical lens
This fast wide-angle lens is especially compact and its imaging performance is outstanding at f/2. The rendition
of the finest details results in pictures with an extraordinary depth effect. Even in critical lighting conditions, for
example in backlit situations, distracting reflections and flare are largely eliminated. Because of its large aperture
of f/2, it can also be used for selective sharpness settings in the wide-angle range. And when pictures are to be
taken without flash under unfavorable light conditions at twilight or in sparsely illuminated rooms, this lens is
highly recommended.
Leica Camera AG
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
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MTF DIAGRAMS
Summicron-M 1:2,0/28mm ASPH. Brennweite 28 mm
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]
0
20
40
60
80
100
[%]
Blende 2.0
Summicron-M 1:2,0/28mm ASPH. Brennweite 28 mm
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 21
Y'[mm]
0
20
40
60
80
100
[%]
Blende 2.0
Summicron-M 1:2,0/28mm ASPH. Brennweite 28 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
[%]
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 SUMMICRON-M 28 mm f/2 ASPH.
[%]
100
80
60
40
20
0
0 3 6 9 12 15 18 21
MTF GRAPHS 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,
[%]
100
80
60
40
20
0
0 3 6 9 12 15 18 21
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.
Leica Camera AG
Aperture Stop 2
Blende 2.0
[%]
Aperture Stop 2.8
Blende 5.6
100
80
60
40
20
0
0 3 6 9 12 15 18 21
Y'[mm]
Y'[mm]
Aperture Stop 5.6
Blende 2.8
Sagittal structures
Tangential structures
Y' [mm]
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
I
Page 3 of 7 I As at January 2016 I Specifications are subject to change without notice
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