Leica APO-Telyt-M 135mm 3.4 User Manual

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

LEICA APO-TELYT-M 135 mm f/3.4

Engineering drawing

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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

LEICA APO-TELYT-M 135 mm f/3.4

MTF graphs

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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