Summicron (II) f= 5 cm 1:2

Leica Order Nos. - 11817-black - 11819-black - [1117-black, 11318 (DR), 11918 (DR) concurrent in catalog] . LLC - 120
Production era - 1968-1979 < 44,029 lenses
Variants - Cylindrical aluminum as shown - [Scalloped focusing knurl (SFK) and dual range (DR) close focus (with "eyes") plated brass versions were still available during the decade, per Forum discussions 3 & 4 below]
Lens mount - M-bayonet
Number of lenses /groups - 6 /5 (aluminum) - [a limited number of the earlier 7 /4 plated brass versions 1117, 1118, 11318 (DR) and 11918 (DR) occur in the serial nos. listed below]
F stop range - f /2 - f /16
Closest focusing distance - 0.7 m
Smallest object field - 277 x 416 mm
Diaphragm setting /type - 10-blade
Angle of view diagonal - 45 degrees
Filter type - E39
Accessories - Hood: ITDOO 12585
Materials - Black anodized aluminum
Dimensions (length x diameter) - 50 x 51 mm / 1.97 x 2.01 in
Weight - 240 g
Inscription - LEITZ WETZLAR 2XXXXXX SUMMICRON 1:2/50
Designer - Walter Mandler
Tech Data - Erwin Puts (2002) Leica M-Lenses.pdf - pgs. 43 - 48

Comment

On the street - $US 850 in 2010
Reviews
Forum discussion
- [1]
- JCB's a little...IIIg
- JCB's a little...M2
- [2]
- [3] [4]
- [5] [6]

Serial numbers compiled from known lenses and Puts Pocket Pod.pdf
* Lens 2822922 is Summicron-R 2/50

SN Start	SN End	Product	Year	Total
2269251	2270250	Summicron f= 5 cm 1:2 (SKF-black)	1968	1000
2278751	2279750	Summicron f= 5 cm 1:2 (SKF-chrom+DR)	1968	1000
2294001	2296350	Summicron f= 5 cm 1:2 (black)	1968	2350
2307151	2307450	Summicron f= 5 cm 1:2	1968	300
2314751	2314800	Summicron f= 5 cm 1:2	1969	50
2330801	2332800	Summicron f= 5 cm 1:2 (black)	1969	2000
2338801	2340800	Summicron f= 5 cm 1:2	1969	2000
2349301	2351300	Summicron f= 5 cm 1:2	1969	2000
2356301	2358300	Summicron f= 5 cm 1:2 (SFK-DR-chrom)	1969	2000
2385701	2387700	Summicron f= 5 cm 1:2 (black 11 817+819)	1970	2000
2407001	2409000	Summicron f= 5 cm 1:2 (black 11 817)	1970	2000
2432751	2434750	Summicron f= 5 cm 1:2 (black)	1970	2000
2438001	2440000	Summicron f= 5 cm 1:2 (black)	1970	2000
2444001	2446000	Summicron f= 5 cm 1:2	1970	2000
2453501	2455500	Summicron f= 5 cm 1:2 (black 11 817)	1970	2000
2518101	2520100	Summicron f= 5 cm 1:2 (black 11 817)	1972	2000
2522401	2522500	Summicron f= 5 cm 1:2	1972	100
2533851	2536250	Summicron f= 5 cm 1:2 (black 11 817)	1972	2400
2583501	2585500	Summicron f= 5 cm 1:2 (black 11 819)	1973	2000
2608501	2610500	Summicron f= 5 cm 1:2 (black 11 817)	1973	2000
2656901	2656950	Summicron f= 5 cm 1:2	1973	50
2698501	2698600	Summicron f= 5 cm 1:2	1974	100
2731922	2731950	Summicron f= 5 cm 1:2	1975	29
2756351	2757350	Summicron f= 5 cm 1:2 (black)	1975	1000
2794651	2796150	Summicron f= 5 cm 1:2	1976	1500
2822351	*2826350	Summicron-M f= 5 cm 1:2	1977	4000
2887001	2887150	Summicron f= 5 cm 1:2	1978	150
TOTAL	ASSIGNED	SERIAL NUMBERS	1968-1978	40,529