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| *'''Leica Order No.''' - 11 647 / '''LLC''' -
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| *'''Era''' - 2008-Current / '''Serial Nos.''' -
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| *'''Lens mount''' - Leica M quick-change bayonet with 6 bit lens identification bar code for digital M models
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| *'''Number of lenses/groups''' - 10/8
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| *'''Aperture''' - 1.4 > 16
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| *'''Focusing range''' - 0.7 m / 2.3 ft < ∞
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| *'''Smallest object field''' - 685 mm x 1027 mm
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| *'''Maximum magnification''' - 1:29
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| *'''Diaphragm setting / type''' - Manual with click-stops including half values
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| *'''Angle of view''' diagonal, horizontal, vertical - 92° / 81° / 59°
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| *'''Position of entrance pupil''' - (from apex of 1st lens element)
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| *'''Scales''' - Combined meter/feet graduation
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| *'''Filter mount/Lens hood''' - Series filter VIII in lens hood
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| *'''Accessories''' - Lens hood separate, screw-on type
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| *'''View finder''' - Camera viewfinder
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| *'''Materials''' - Anodized aluminum and optical glass
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| *'''Focal length''' - 21.6 mm
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| *'''Length to bayonet flange''' - length - 66 > 77 mm / 2.60 > 3.03 in (without > with lens hood)
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| *'''Largest diameter''' - approx. 69.5 mm / 2.74 in
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| *'''Weight''' - approx. 580 g / 20.46 oz
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| *'''Inscription''' - SUMMILUX-M 1:1.4/21 ASPH.
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