Leica 11649 User Manual
LEICA SUPER-ELMAR-M 18 mm f/3.8 ASPH.
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The LEICA SUPER-ELMAR-M 18 mm f/3.8 ASPH. features a lens element with two aspherical surfaces, ensuring outstanding optical performance across the image plane and at all f-stops. With the lens set to maximum aperture and mounted on a traditional
Leica M or digital LEICA M8 model, vignetting – an effect which is inherently more prevalent with super wide angle lenses –
amounts to a nominal 2.3 stops or 1.7 stops on an M8. Stopping down to f/5.6 reduces the vignetting to a value of 1.3 or 1
respectively. Maximum distortion, in turn, measures only 1.8 percent and is virtually undetectable to the human eye.
Summary: The LEICA ELMAR-M 18mm f/3.8 ASPH. not only offers optimum image performance, it has compact dimensions - for
its focal length - and provides all Leica M users with an economical introduction to super wide-angle photography.
Lens shape
ASPH.
LEICA SUPER-ELMAR-M 18 mm f/3.8 ASPH.
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Engineering drawing
Technical Data
Angle of view (diagonal, horizontal, vertical)
Optical design
Distance setting
Aperture
Bayonet
Filter mount/Lens hood
Dimension and weight
For 35 mm: 100°, 90°, 67° / For LEICA M8 models (18 x 27 mm): 84°, 74°, 53°
Number of lenses/groups: 8 / 7
Focal length: 18.3 mm
Position of entrance pupil: 19.8 mm (related to the first lens surface in light direction)
Focusing range: 0.7 m to infinity
Scales: Combined meter/feet graduation
Smallest object field: 827 mm x 1241 mm (35 mm), 620 x 931 mm (LEICA M8 models)
Largest reproduction ratio: 1:34.6
Setting/Function: With click-stops, half values available, manual diaphragm
Lowest value: 16 / Number of blades: 9
Leica M quick-change bayonet with 6 bit lens identification bar code for digital M models
Male thread, non-rotating and with stop for filter holder or lens hood.
Accessory filter holder for E77 filters available / Separate, screw-on type, included in delivery
Length: 58 mm (2.28 in)
Largest diamater: 61 mm (2.4 in)
Weight: approx. 310 g (10.93 oz.)
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