LEICA ELMARIT-M 28 Mm F/2.8 ASPH. 1

LEICA ELMARIT-M 28 mm f/2.8 ASPH. 1

This new high-speed lens is the most compact of Leica M lenses. By using an aspherical element it was possible to attain top ima- ging performance with a weight of only 180 grams. This lens is practically distortion-free in the whole focus range from 0.7 m to infinity and only extends slightly into the viewfinder field of M cameras. Used on the digital M8, it produces the effect of a 35mm lens which makes it ideal for reportage. Due to its attractive price it can be particularly recommended as an introduction to the high- quality range of Leica M lenses.

Lens shape

Asphere LEICA ELMARIT-M 1:2,8/28 mm ASPH. 2

Engineering drawing

Technical Data Angle of view (diagonal, horizontal, vertical) for 35 mm (24 x 36 mm): 75°, 65°, 46° for digital (18 x 27 mm): 60°, 51°, 36°, corresponds to a focal length of approx. 37mm with 35mm-format Optical design Number of elements / groups: 8 / 6 Focal length: 28,4 mm Entrance pupil: 12,8 mm (related to the first lens surface in light direction) Focusing range: 0.7 m to Infinity Distance setting Scale: combined meter/feet-increments Smallest object field: for 35 mm: 533 x 800mm, for digital: 400 x 600 mm Highest reproduction ratio: 1:22 Diaphragm Setting / Type: Preset, with click-stops, half values available Smallest aperture: f/22 Bayonet Leica M quick-change bayonet with 6 bit identification bar code for digital M models Filter (type) Internal thread for screw-on filters size E39 Lens hood Snap-on type (supplied) Dimensions and weight Length: approx. 30/46 mm (with/without lens hood) Largest diameter: approx. 52 mm Weight: approx. 180g Aperture Stop 2.8 Vignetting [%] [%] 100 100

80 80 8.0 5.6 2.8 60 60

40 40

20 20

0 0 05101520 05101520 Y'[mm] Y'[mm]

Aperture Stop 5.6 Relative Distortion [%] [%] 100 5 4 80 3 LEICA ELMARIT-M 1:2,8/28 mm ASPH. 2 3 60 1 0 40 -1 -2 20 -3 -4 0 -5 MTF graphs 05101520 05101520 Y'[mm] Y'[mm]

ApertureStop 2.8 VignettingApertureStop 8.0 Effective Distortion [%] [%] [%] 100 100 100 Y'[mm] 80 80 80 8.0 5.6 12 2.8 Aperture Stop 2.8 Vignetting 60[%] 60[%] 60 100 100 9 40 40 40 80 80 8.0 6 5.6 20 20 20 2.8 3 60 60 0 0 0 0 40 0 5 10 15 20 40 051015200 5 10 15 20 0369121518 Y'[mm] Y'[mm] Y'[mm] X'[mm] 20 20 Aperture Stop 5.6 Relative Distortion [%] [%] 100 5 0 0 05101520 4 05101520 80 Y'[mm] 3 Y'[mm] 2 ApertureStop 5.6 Relative Distortion 60[%] 1[%] 100 50 The MTF is indicated at full aperture and at 40 -14 f/5.6 and f/8.0 at long taking distances (infinity). 80 3 Shown is the contrast in percentage for 5, 10, 20 -2 and 40 lp/mm accross the height of the 35 mm 20 -32 film format, for tangential (dotted line) and sagittal 60 -41 (solid line) structures, in white light. The 5 and 0 10 lp/mm will give an indication regarding the 0 -5 contrast ratio for large object structures.The 40 05101520-1 0510152020 and 40 lp/mm records the resolution of finer Y'[mm] -2 and finest object structures. Y'[mm] 20 -3 Aperture Stop 8.0 Effective Distortion [%] -4 sagittal structures 100 ______0 -5 tangential structures 0 5 10 15 20 Y'[mm]05101520 80 Y'[mm] Y'[mm] 12 Aperture Stop 8.0 Effective Distortion 60[%] 100 9 Y'[mm] 40 6 80 12 20 3 60 9 0 0 40 05101520 0369121518 6 Y'[mm] X'[mm] 20 3

0 0 05101520 0369121518 Y'[mm] X'[mm] Aperture Stop 2.8 Vignetting [%] [%] 100 100

80 80 8.0 5.6 2.8 60 60

40 40

20 20

0 0 05101520 05101520 Y'[mm] Y'[mm]

Aperture Stop 2.8 VignettingAperture Stop 5.6 Relative Distortion [%] [%] [%] [%] 100 100 100 5 4 80 80 80 8.0 3 5.6 LEICA ELMARIT-M 1:2,8/28 mm ASPH.2 4 2.8 60 60 60 1 0 40 40 40 -1 -2 20 20 20 -3 -4 0 Distortion0 0 -5 05101520 0510152005101520 05101520 Y'[mm] Y'[mm] Y'[mm] Y'[mm]

Aperture Stop 5.6 Relative DistortionAperture Stop 8.0 Effective Distortion [%] [%] [%] 100 5 100 4 Y'[mm] 80 3 80 12 2 60 1 60 9 0 40 40 -1 6 -2 20 -3 20 3 -4 0 -5 0 0 05101520 0 5 0510152010 15 20 0 3 6 9 12 15 18 Y'[mm] Y'[mm] Y'[mm] X'[mm]

Aperture Stop 8.0 Effective Distortion [%] 100 Y'[mm] 80 12 Vignetting 60 9

40 Aperture Stop 2.8 Vignetting [%] 6[%] 100 100 Distortion is the deviation of the real image height 20 3 (in the picture) from the ideal image height. The 80 80 8.0 relative distortion is the percentage deviation. 5.6 The ideal image height results from the object 0 0 2.8 height and the magnification. The image height of 60 0510152060 0369121518 21.6mm is the radial distance between the edge and Y'[mm] X'[mm] the middle of the image field for the format 24mm x 36mm. The graph of the effective distortion illustra- 40 40 tes the appearance of straight horizontal and vertical lines in the picture. 20 20 Vignetting is a continous decrease of the illumination to the edges of the image field. The graph 0 0 shows the percentage loss of illumination over the 05101520 0 5 10 15 20 image height. 100% means no vignetting. Y'[mm] Y'[mm]

Aperture Stop 5.6 Relative Distortion [%] [%] 100 5 4 80 3 2 60 1 0 40 -1 -2 20 -3 -4 0 -5 05101520 05101520 Y'[mm] Y'[mm]

Aperture Stop 8.0 Effective Distortion [%] 100 Y'[mm] 80 12 60 9

40 6

20 3

0 0 05101520 0369121518 Y'[mm] X'[mm] LEICA ELMARIT-M 1:2,8/28 mm ASPH. 5

Depth of field table

Aperture Stop Magnification 2,8 4 5,6 8 11 16 22 0,7 0,654 - 0,754 0,636 - 0,780 0,614 - 0,817 0,583 - 0,881 0,550 - 0,977 0,502 - 1,198 0,455 - 1,654 1/22,2 0,8 0,739 - 0,872 0,716 - 0,907 0,688 - 0,959 0,649 - 1,050 0,607 - 1,192 0,548 - 1,546 0,492 - 2,424 1/25,7 1 0,905 - 1,118 0,870 - 1,178 0,827 - 1,269 0,771 - 1,438 0,711 - 1,726 0,631 - 2,608 0,556 - 6,945 1/32,8 1,2 1,064 - 1,377 1,015 - 1,471 0,957 - 1,618 0,882 - 1,906 0,803 - 2,458 0,700 - 4,810 0,609 - ∞ 1/39,8 1,5 1,291 - 1,793 1,219 - 1,957 1,135 - 2,231 1,029 - 2,829 0,922 - 4,272 0,788 - 30,92 0,672 - ∞ 1/50,3 2 1,641 - 2,566 1,525 - 2,923 1,394 - 3,590 1,235 - 5,480 1,083 - 16,30 0,900 - ∞ 0,750 - ∞ 1/67,9 3 2,251 - 4,515 2,035 - 5,770 1,806 - 9,188 1,545 - 87,40 1,311 - ∞ 1,050 - ∞ 0,849 - ∞ 1/103

Distance Setting [m] Setting Distance 5 3,204 - 11,51 2,780 - 26,15 2,365 - ∞ 1,934 - ∞ 1,577 - ∞ 1,210 - ∞ 0,950 - ∞ 1/173 10 4,695 - ∞ 3,832 - ∞ 3,080 - ∞ 2,383 - ∞ 1,861 - ∞ 1,368 - ∞ 1,042 - ∞ 1/349 ∞ 8,782 - ∞ 6,163 - ∞ 4,416 - ∞ 3,104 - ∞ 2,268 - ∞ 1,572 - ∞ 1,154 - ∞ 1/∞

Aperture Stop 2,8