Page 1
LEICA APO-TELYT-M 135 mm f/3.4
1
A telephoto lens without compromises, it offers outstand-ing imaging performance at full aperture that cannot be further improved
by stopping down. Minimal vignetting and the very slightest distortion are additional strengths. Even the finest details are rendered
clearly with rich contrast. It is the longest focal length in the Leica M system and it bridges considerable distances, thus judiciously
rounding out any serious outfit. It delivers impressive landscape photographs with a typical telephoto effect : the foreground and the
background are visibly compressed. Another benefit is the ability to make format-filling portraits from a discreet distance that the
subject will not consider as obtrusive.
Lens shape
Page 2
LEICA APO-TELYT-M 135 mm f/3.4
Engineering drawing
2
Technical Data
Angle of view (diagonal, horizontal, vertical)
Optical design
Distance setting
Diaphragm
Bayonet
Filter (type)
Lens hood
Dimensions and weight
18°, 15°, 10.2°
Number of elements / groups: 5 / 4
Focal length: 136 mm
Entrance pupil: 68 mm (related to the first lens surface in light direction)
Focusing range: 1.5 m to Infinity
Scale: combined meter/feet-increments
Smallest object field: 220 mm x 330 mm
Highest reproduction ratio: 1:9
Setting / Type: with clickstops (including half values), manual diaphragm
Smallest aperture: f/22
Leica M quick-change bayonet
internal thread for screw-in type filters E 49
built-in, telescopic
Length: 104.7 m m
Largest diameter: 58.5 mm
Weight: approx. 450 g
Page 3
LEICA APO-TELYT-M 135 mm f/3.4
MTF graphs
3
Aperture Stop 3.4
100
[%]
80
60
40
20
0
0 5 10 15 20
Aperture Stop 5.6
100
[%]
80
60
40
Y'[mm]
Aperture Stop 8.0
100
[%]
80
60
40
20
0
0 5 10 15 20
Y'[mm]
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.
20
0
0 5 10 15 20
Y'[mm]
_ _ _ _ _ _ _ _
sagittal structures
tangential structures
Page 4
LEICA APO-TELYT-M 135 mm f/3.4
Distortion
4
[%]
5
Relative Distortion
4
3
2
1
0
-1
-2
-3
-4
-5
0 5 10 15 20
Vignetting
Y'[mm]
Effective Distortion
Y'[mm]
12
9
6
3
0
0 3 6 9 12 15 18
X'[mm]
[%]
100
80
60
40
20
0
0 5 10 15 20
Vignetting
Y'[mm]
8.0
5.6
3.4
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
21.6mm is the radial distance between the edge and
the middle of the image field for the format 24mm x
36mm. The graph of the effective distortion illustrates the appearance of straight horizontal and vertical lines in the picture.
Vignetting is a continous decrease of the illumination to the edges of the image field. The graph
shows the percentage lost of illumination over the
image height. 100% means no vignetting.
_ _ _ _ _ _ _ _
sagittal structures
tangential structures
Page 5
LEICA APO-TELYT-M 135 mm f/3.4
Depth of field table
5
Aperture Stop
81116223,4 4 5,6
1,5 1,488 - 1,512 1,486 - 1,515 1,480 - 1,520 1,472 - 1,529 1,461 - 1,541 1,445 - 1,560 1,425 - 1,584 1/8,94
1,7 1,684 - 1,716 1,681 - 1,719 1,674 - 1,727 1,663 - 1,738 1,650 - 1,753 1,628 - 1,779 1,603 - 1,810 1/10,4
2 1,978 - 2,023 1,974 - 2,027 1,964 - 2,038 1,949 - 2,054 1,930 - 2,076 1,900 - 2,112 1,865 - 2,157 1/12,6
2,5 2,465 - 2,536 2,459 - 2,543 2,443 - 2,560 2,419 - 2,587 2,390 - 2,621 2,343 - 2,680 2,289 - 2,755 1/16,3
3 2,949 - 3,053 2,940 - 3,062 2,917 - 3,088 2,883 - 3,128 2,841 - 3,178 2,774 - 3,267 2,698 - 3,380 1/20,0
4 3,909 - 4,096 3,893 - 4,113 3,852 - 4,160 3,792 - 4,233 3,719 - 4,328 3,604 - 4,496 3,475 - 4,715 1/27,4
5 4,857 - 5,152 4,833 - 5,179 4,769 - 5,255 4,676 - 5,373 4,566 - 5,527 4,392 - 5,806 4,202 - 6,181 1/34,7
7 6,721 - 7,304 6,674 - 7,360 6,552 - 7,514 6,377 - 7,759 6,171 - 8,089 5,857 - 8,705 5,520 - 9,583 1/49,4
Distance Setting [m]
10 9,436 - 10,64 9,344 - 10,76 9,105 - 11,09 8,769 - 11,64 8,383 - 12,40 7,810 - 13,92 7,218 - 16,32 1/71,4
20 17,85 - 22,74 17,52 - 23,29 16,70 - 24,94 15,59 - 27,90 14,41 - 32,75 12,78 - 46,15 11,26 - 90,76 1/145
∞ 165,2 - ∞ 140,7 - ∞ 100,5 - ∞ 70,34 - ∞ 51,17 - ∞ 35,20 - ∞ 25,62 - ∞ 1/∞
Magnification
Aperture Stop 3,4
1,5
1,7
2
2,5
3
4
5
7
10
Distance Setting [m]
20
∞
0 102030405060708090100
Depth of Field [m]
Aperture Stop 4
1,5
1,7
2
2,5
3
4
5
7
10
Distance Setting [m]
20
∞
0 102030405060708090100
Depth of Field [m]
Page 6
LEICA APO-TELYT-M 135 mm f/3.4
6
Aperture Stop 5,6
1,5
1,7
2
2,5
3
4
5
7
10
Distance Setting [m]
20
∞
0 102030405060708090100
Depth of Field [m]
Aperture Stop 8
1,5
1,7
2
2,5
3
4
5
7
10
Distance Setting [m]
20
∞
0 102030405060708090100
Depth of Field [m]
Aperture Stop 11
1,5
1,7
2
2,5
3
4
5
7
10
Distance Setting [m]
20
∞
0 102030405060708090100
Depth of Field [m]
Page 7
LEICA APO-TELYT-M 135 mm f/3.4
Aperture Stop 16
1,5
1,7
2
2,5
3
4
5
7
10
Distance Setting [m]
20
∞
0 102030405060708090100
Depth of Field [m]
7
Aperture Stop 22
1,5
1,7
2
2,5
3
4
5
7
10
Distance Setting [m]
20
∞
0 102030405060708090100
Depth of Field [m]
Leica Camera AG / Oskar-Barnack-Straße 11 / D-35606 Solms / Telefon +49 (0) 6442- 208-0 / Telefax +49 (0) 6442- 208- 333
www.leica-camera.com / info@leica- camera.com
Loading...