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A telephoto lens of uncompromising quality with apochromatic color correction, the resolution, contrast, and sharpness of the 135 mm Apo-Telyt are optimal at all apertures. It also has very little light falloff even at maximum aperture and minimal distortion, resulting in top pro-level performance. This lens can render the finest details clearly and in rich contrast. As the longest focal length in the Leica M system, it's ideal for shooting over long distances and is the perfect completion of any high-class outfit. It permits distinctive landscape shots with typical telephoto effects: the foreground and background are visually compressed. Moreover, it enables frame-filling portraits to be shot from afar, so the subject is undisturbed.

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| Angle of view (diagonal, horizontal, vertical) |
18°, 15°, 10.2° |
| Optical design |
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 |
| Distance setting |
Scale: combined meter/feet-increments Smallest object field: 220 mm x 330 mm Highest reproduction ratio: 1:9 |
| Diaphragm |
Setting / Type: with clickstops (including half values), manual diaphragm Smallest aperture: f/22 |
| Bayonet |
Leica M quick-change bayonet |
| Filter (type) |
internal thread for screw-in type filters E 49 |
| Lens hood |
built-in, telescopic |
| Dimensions and weight |
Length: 104.7 mm Largest diameter: 58.5 mm Weight: approx. 450 g |
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