Leica Order Nos. – 11807-black, 11808-chrom, 11899-titan . LLC – 173 Production era – 1990-2007 < 24,520 lenses Variants – Black, chrome and titanium Lens mount – Leica M-bayonet Number of lenses /groups – 4 /4 F stop range – f/2.8 – f/22 Closest focusing distance – 1 m /3.28 ft Smallest object field – 220 x 330 mm /1:9 Diaphragm setting /type – with clickstops (including half values), manual diaphragm / 10-blade Angle of view diagonal, horizontal, vertical – 27¡Æ, 23¡Æ, 15¡Æ Filter type – E46 Materials – Black anodized aluminum or chrome plated brass Dimensions length x diameter – 76 x 56.5 mm /2.99 x 2.22 in Weight – 410 g black, 560 g chrome /0.90 lb black, 1.23 lb chrome Inscription – LEICA ELMARIT-M 1:2.8/90 E46 3XXXXXX