LEICA SUMMICRON-M 35 mm f/2 ASPH.
Technical Data.
Illustrations 1:1
Lens Leica Summicron-M 35 mm f/2 ASPH.
Order number Black: 11 673, silver: 11 674
Angle view For 35 mm (24 x 36 mm): approx. 63°/54°/38°; (diagonal, horizontal, vertical) for M8 (18 x 27 mm): approx. 50°/42°/29°
Optical design Number of elements/groups: 7/5 Entrance pupil for bayonet: 18,4 mm Focusing range: 0,7 m to infinity
Distance setting Scala: combined meter-/feet-increments Smallest object field: for 35 mm: 420 x 630 mm, for M8: 315 x 472 mm Highest reproduction ratio: 1:17,4
Diaphragm Setting/type: preset, with click-stops, half values available Smallest aperture: f/16 Number of aperture blades: 11
Bayonet Leica M quick-change bayonet
Filter thread E39
Lens hood Available, screwable (supplied)
Dimensions and weight Lenght: approx. 35,7/54,4 mm (without/with lens hood) Largest diameter without lens hood: approx. 53 mm Weight: approx. 252 g/287 g (without/with lens hood and covers)
Page 1 of 7 I As at January 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 SUMMICRON-M 35 mm f/2 ASPH.
ENGINEERING DRAWING LENS SHAPE
Aspherical lens
Illustrations 1:1
Excellent sharpness, high contrast and a very good resolving power over the entire focusing range are evident at full aperture. With its aperture stopped down modestly to f/4, this versatile lens delivers a maximum of resolving power and contrast. It is all the more impressive because of its virtually perfect absence of distortion. That makes it a world-class lens among fast wide-angle lenses. In spite of its high speed and its superb imaging performance, it is surprisingly small. Every Leica M camera fitted with this lens becomes a highly compact and elegant unit.
Page 2 of 7 I As at January 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 SUMMICRON-M 35 mm f/2 ASPH. 3 LEICA SUMMICRON-M 35 mm f/2 ASPH.
MTF-GRAPHS
MTF graphs
Aperture Stop 2.0 Aperture Stop 5.6 [%] [%] 100 100
80 80
60 60
40 40
20 20
0 0 0 5 10 15 20 0 5 10 15 20 Y' [mm] Y' [mm]
Aperture Stop 2.8 [%] 100 The MTF is indicated both at full aperture and at f/5.6 at long taking distances (infinity). Shown 80 is the contrast in percentage for 5, 10, 20 and 40 lp/mm accross the height of the 35 mm film format, for tangential (dotted line) and sagittal 60 (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 40 20 and 40 lp/mm records the resolution of finer and finest object structures. 20 Sagittal structures sagittal structures 0 ______tangentialTangential structures structures 0 5 10 15 20 Y' [mm]
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, 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.
Page 3 of 7 I As at January 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 SUMMICRON-M 35 mm f/2 ASPH. 4 LEICA SUMMICRON-M 35 mm f/2 ASPH. 4
LEICA SUMMICRON-M 35 mm f/2 ASPH.
Distortion
Distortion Distortion
Relative Distortion Effective Distortion [%] 5 Relative Distortion Effective Distortion 4[%] Y' [mm] 5 3 4 Y' [mm] 2 12 3 1 2 12 0 9 1 -1 0 69 -2 -1 -3 6 -2 3 -4 -3 -5 03 -4 0 5 10 15 20 0 3 6 9 12 15 18 -5 Y' [mm] 0 X' [mm] 0 5 10 15 20 0 3 6 9 12 15 18 Y' [mm] X' [mm]
VIGNETTING Vignetting
Vignetting Distortion is the deviation of the real image height [%] 100 (in the picture) from the ideal image height. The relativeDistortion distortion is the deviation is the percentage of the real deviation. image height [%] The(in the ideal picture) image fromheight the results ideal imagefrom the height. object The 100 5.6 80 heightrelative and distortion the magnification. is the percentage The image deviation. height of 2.8 21.6mmThe ideal is image the radial height distance results betweenfrom the theobject edge and 80 2.05.6 theheight middle and ofthe the magnification. image field for The the image format height 24mm of x 60 2.8 36mm.21.6mm The is the graph radial of thedistance effective between distortion the edge illustra- and 2.0 testhe themiddle appearance of the image of straight field for horizontal the format and 24mm verti- x 60 40 cal36mm. lines The in the graph picture. of the effective distortion illustra- tes the appearance of straight horizontal and verti- Vignetting is a continous decrease of the illumina- 40 cal lines in the picture. 20 tion to the edges of the image field. The graph showsVignetting the percentageis a continousSagittal lost decrease ofstructures illumination of the overillumina- the 20 imagetion to height. the edges 100% of meansthe image no vignetting.field. The graph 0 shows the percentageTangential lost of structuresillumination over the 0 5 10 15 20 image height. 100%sagittal means structures no vignetting. ______0 Y' [mm] tangential structures 0 5 10 15 20 sagittal structures ______Y' [mm] tangential structures
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 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 appearance of straight horizontal and vertical lines in the picture.
VIGNETTING Vignetting 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.
Page 4 of 7 I As at January 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 SUMMICRON-M 35 mm f/2 ASPH.
Depth of field table
Page 5 of 7 I As at January 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 SUMMICRON-M 35 mm f/2 ASPH.
Page 6 of 7 I As at January 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 SUMMICRON-M 35 mm f/2 ASPH.
Page 7 of 7 I As at January 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