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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 opti-
cal 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.
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Related Manuals for Leica SUPER-ELMAR-M 18 mm f/3.8 ASPH.
Summary of Contents for Leica SUPER-ELMAR-M 18 mm f/3.8 ASPH.
- Page 1 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 –...
- Page 2 Engineering drawing Technical Data Angle of view (diagonal, horizontal, vertical) For 35 mm: 100°, 90°, 67° / For LEICA M8 models (18 x 27 mm): 84°, 74°, 53° Optical design 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)
- Page 3 LEICA SUPER-ELMAR-M 18 mm f/3.8 ASPH. MTF graphs Aperture Stop 3.8 Aperture Stop 8.0 Y' [mm] = 21.0 Y' [mm] = 21.0 Aperture Stop 5.6 The MTF is indicated both at full aperture and at f/5.6 at long taking distances (infinity). Shown...
- Page 4 LEICA SUPER-ELMAR-M 18 mm f/3.8 ASPH. Distortion Effective Distortion Relative Distortion Y'[mm] X'[mm] Y' [mm] = 21.0 Vignetting Vignetting Distortion is the deviation of the real image height (in the picture) from the ideal image height. The relative distortion is the percentage deviation.
- Page 5 LEICA SUPER-ELMAR-M 18 mm f/3.8 ASPH. Depth of field table Aperture Stop Magnification 0,575 - 0,904 0,532 - 1,054 0,484 - 1,361 0,436 - 2,178 0,377 - ∞ 1/34,5 0,638 - 1,087 0,584 - 1,317 0,526 - 1,851 0,469 - 3,879 0,399 - ∞...
- Page 6 Aperture Stop 11 ∞ Depth of Field [m] Aperture Stop 16 ∞ 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...
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