View source for Summicron (I) f= 5 cm 1:2

[[Image:5summicron2i.jpg|150px]] [[Image:M-50f2-ii.jpg|300px]] [[Image:M-5f2dr.jpg|150px]]

*'''Leica Order No.''' - SOOIC, SOSTA, M-bayonet: SOOIC-M, 11118 (M-rigid-chrom), SOSIC 11818 (M-rigid-chrom), SOMNI 11918 (M-DR-chrom) /'''LLC''' -  118
*'''Production era''' -  1953-1969 < 253,314 lenses per list below
*'''Variants''' - Collapsible, rigid, rigid Dual Range (DR); Compur shutter (CS), chrome and black; duel lever (s/n 920022)   
*'''Lens mount''' - Leica Screw-thread and M-bayonet
*'''Compatibility''' - DR version cannot be used on [[M8]] or [[M9]] cameras and the collapsible type can only be used fully extended.
*'''Number of lenses /groups''' - 7 /4 - 4 /4 (collapsible)
*'''F stop range''' - f/2-f/16
*'''Closest focusing distance''' - 1 m
*'''Smallest object field''' - 410 x 620 mm
*'''Diaphragm setting /type''' - 10-blade - 16-blade 11 918 & 11 818
*'''Angle of view''' diagonal - 45 degrees
*'''Filter type''' -  E39 - A42
*'''Accessories''' - Hood: [[SOOFM]] - [[IROOA]]; Viewfinder: [[SBOOI]] 12015; Close-focus attachment for DR lens: SDPOO (for proper fit last 4 digits of serial nos. must match); close focus for collapsible or rigid lens: [[SOMKY]]+ UOORF
*'''Materials''' -  Chrome plated brass
*'''Dimensions''' (length x diameter) -
*'''Weight''' - 220 g /7.76 oz screw, 285 g /10.06 oz bayonet 
*'''Inscription''' - Summicron f=5cm 1:2 9XXXXX Ernst Leitz [GmbH] Wetzlar
*'''Designer''' - [[Gustav Kleinberg]]

== Comment ==
*'''On the street''' - $US 425 (collapsible-M) - 250 (collapsible-S) - 300 (DR) - 700 (rigid-M) - 1,900 (rigid-S) in 2010

*'''Forum discussion'''
**[http://www.l-camera-forum.com/leica-forum/customer-forum/7165-m8-dual-range-summicron.html] [http://www.l-camera-forum.com/leica-forum/customer-forum/7165-m8-dual-range-summicron-2.html] [http://www.l-camera-forum.com/leica-forum/customer-forum/7165-m8-dual-range-summicron-3.html]
**[http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/21456-your-favorite-leica-screw-mount-lens.html] [http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/21456-your-favorite-leica-screw-mount-lens-2.html] [http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/21456-your-favorite-leica-screw-mount-lens-3.html]
**[http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/34686-summicron-5cm-collapsible.html]
**[http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/48866-summicron-11817-knurled-ring.html]
**[http://www.l-camera-forum.com/leica-forum/film-forum/53370-collapsible-summicron-type-i-rigid-summicron.html Test shots]
**[http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/55373-summicron-1-2-50-a.html]
**[http://www.l-camera-forum.com/leica-forum/customer-forum/70870-compatability-50mm-summicron-dr-again-m6.html]
**[http://www.l-camera-forum.com/leica-forum/customer-forum/80261-version-summicron-m-50mm-best.html]
**[http://www.l-camera-forum.com/leica-forum/customer-forum/80951-radioactive-glass-used-leica-lens-1950s.html] [http://www.l-camera-forum.com/leica-forum/customer-forum/80951-radioactive-glass-used-leica-lens-1950s-2.html]
**[http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/81056-little-24-a.html JCB's a little...Ig]
**[http://www.l-camera-forum.com/leica-forum/customer-forum/84601-opinions-collapsable-summicron-50mm-please.html]
**[http://www.l-camera-forum.com/leica-forum/customer-forum/117280-summicron-50mm-f2-rigid-legendary.html]
**[http://www.l-camera-forum.com/leica-forum/film-forum/120708-dr-summicron-eyes-m5-m7.html]
**[http://www.l-camera-forum.com/leica-forum/customer-forum/137537-leica-50mm-cron-part-number.html]
**[http://www.l-camera-forum.com/leica-forum/film-forum/149238-collapsible-summicron-aperture-ring-stiff.html]
*'''Reviews'''
** [http://www.luciolepri.it/lc2/marcocavina/articoli_fotografici/Berek_Summitar_Summarex/00_pag.htm Marco Cavina 1]
** [http://www.luciolepri.it/lc2/marcocavina/articoli_fotografici/Leitz_Summitar_star_radioactive_glass/00_pag.htm Marco Cavina 2]
**[http://www.imx.nl/photo/leica/lenses/lenses/lenses/page86.html Erwin Puts] - (2/50 is at bottom of page)

== Summicron (I) f= 5 cm 1:2 Serial Numbers ==

{| class="prettytable"
!SN Start
!SN End
!Product
!Year
!Total
|-
|920000||930000||Summicron f= 5 cm 1:2 (M+S-collapsible)||1951||10001
|-
|959001||960000||Summicron f= 5 cm 1:2 ||1952||1000
|-
|993001||996000||Summicron f= 5 cm 1:2 (S-collapsible)||1952||3000
|-
|1009001||1010000||Summicron f= 5 cm 1:2 ||1952||1000
|-
|1020001||1025000||Summicron f= 5 cm 1:2 ||1952||5000
|-
|1040001||1045000||Summicron f= 5 cm 1:2 (S-collapsible)||1952||5000
|-
|1091001||1097000||Summicron f= 5 cm 1:2 (S-collapsible)||1953||6000
|-
|1103001||1106000||Summicron f= 5 cm 1:2 (S-collapsible)||1953||3000
|-
|1113438||1114000||Summicron f= 5 cm 1:2 ||1953||563
|-
|1114001||1119000||Summicron f= 5 cm 1:2 (M-collapsible)||1953||5000
|-
|1124701||1127000||Summicron f= 5 cm 1:2 ||1954||2300
|-
|1143001||1145000||Summicron f= 5 cm 1:2 (M-collapsible) ||1954||2000
|-
|1152001||1157000||Summicron f= 5 cm 1:2 (CS+S-collapsible)||1954||5000
|-
|1166001||1170000||Summicron f= 5 cm 1:2 ||1954||4000
|-
|1172501||1175000||Summicron f= 5 cm 1:2 (M-collapsible)||1954||2500
|-
|1175501||^1178000||Summicron f= 5 cm 1:2 ||1954||2500
|-
|1190001||1195000||Summicron f= 5 cm 1:2 (M-collapsible)||1954||5000
|-
|1195001||1198000||Summicron f= 5 cm 1:2 ||1954||3000
|-
|1203001||1206000||Summicron f= 5 cm 1:2 ||1954||3000
|-
|1215001||1220000||Summicron f= 5 cm 1:2 (S+M-collapsible)||1954||5000
|-
|1231101||1236000||Summicron f= 5 cm 1:2 (S-collapsible)||1954||4900
|-
|1252001||1256000||Summicron f= 5 cm 1:2 ||1955||4000
|-
|1263001||1268000||Summicron f= 5 cm 1:2 (M+S-collapsible)||1955||5000
|-
|1277001||1282000||Summicron f= 5 cm 1:2 (M-collapsible)||1955||5000
|-
|1300701||1305000||Summicron f= 5 cm 1:2 ||1955||4300
|-
|1315001||1320000||Summicron f= 5 cm 1:2 (M+S-collapsible)||1955||5000
|-
|1325501||1330000||Summicron f= 5 cm 1:2 (S-collapsible)||1955||4500
|-
|1348001||1353000||Summicron f= 5 cm 1:2 (M-collapsible) ||1956||5000
|-
|1363501^^^||1366000||Summicron f= 5 cm 1:2 ||1956||2500
|-
|1368501||1371000||Summicron f= 5 cm 1:2 ||1956||2500
|-
|1375001||1380000||Summicron f= 5 cm 1:2 (M-collapsible)||1956||5000
|-
|1393001||1396750||Summicron f= 5 cm 1:2 (M-collapsible)||1956||3750
|-
|1400001||1401000||Summicron f= 5 cm 1:2 (M-DR+M-rigid-chrom)||1956||1000
|-
|1401001||1402000||Summicron f= 5 cm 1:2 ||1956||1000
|-
|1402201||1405000||Summicron f= 5 cm 1:2 (M-DR-chrom)||1956||2800
|-
|1446001||1450000||Summicron f= 5 cm 1:2 (M-DR+M-rigid-chrom)||1956||4000
|-
|1465001||1470000||Summicron f= 5 cm 1:2 (M-DR-chrom)||1957||5000
|-
|1473001||1477000||Summicron f= 5 cm 1:2 (M-DR-chrom+black)||1957||4000
|-
|1478501||1481700||Summicron f= 5 cm 1:2 (S-collapsible)||1957||5000
|-
|1510001||1515000||Summicron f= 5 cm 1:2 (M-rigid+DR-chrom)||1957||5000
|-
|1530001||1535000||Summicron f= 5 cm 1:2 (M-DR+M-rigid-chrom)||1957||5000
|-
|1541001||1546000||Summicron f= 5 cm 1:2 (M-DR+M-rigid-chrom)||1957||5000
|-
|1567001^^||1572000||Summicron f= 5 cm 1:2 (M-DR-chrom+M-rigid-black)||1958||5000
|-
|1578501||1580000||Summicron f= 5 cm 1:2 ||1958||1500
|-
|1581001||1583000||Summicron f= 5 cm 1:2 (M+S-rigid-chrom)||1958||2000
|-
|1585101||1588000||Summicron f= 5 cm 1:2 (M-DR+M+S-rigid-chrom+M-rigid-black)||1958||2900
|-
|1592001||1594000||Summicron f= 5 cm 1:2 (S-chrom+M-DR-chrom)||1958||2000
|-
|1597001||1600000||Summicron f= 5 cm 1:2 (M+DR+S-rigid-chrom)||1958||3000
|-
|1605501||1608000||Summicron f= 5 cm 1:2  (S-rigid-chrom+M-DR-chrom)||1958||2500
|-
|1623001||1624000||Summicron f= 5 cm 1:2 (M-rigid+DR-chrom-11818)||1958||1000
|-
|1704001||1709000||Summicron f= 5 cm 1:2  (S-rigid+DR-chrom)||1959||5000
|-
|1749501||1752000||Summicron f= 5 cm 1:2 ||1960||2500
|-
|1762001||1765000||Summicron f= 5 cm 1:2  (M-DR+S-chrom)||1960||3000
|-
|1784001||1788000||Summicron f= 5 cm 1:2 (M-rigid-chrom)||1960||4000
|-
|1811001||1814000||Summicron f= 5 cm 1:2 (M+DR-rigid-chrom)||1960||3000
|-
|1831001||1838000||Summicron f= 5 cm 1:2 (S-chrom+M-DR-chrom+black)||1961||7000
|-
|1885001||1888000||Summicron f= 5 cm 1:2 (M-rigid-chrom)||1961||3000
|-
|1894801||1896000||Summicron f= 5 cm 1:2 (M-rigid)||1961||1200
|-
|1924001||1927000||Summicron f= 5 cm 1:2 (M-rigid.bleck+chrom)||1962||3000
|-
|1942001||1945000||Summicron f= 5 cm 1:2 ||1962||3000
|-
|1950001||**1951000||Freigehalten (M-DR-chrom)||1962||[1000]
|-
|1951001||1953000||Summicron f= *5 cm 1:2 (M-DR-chrom)||1962||2000
|-
|1954001||1957000||Summicron f= 5 cm 1:2 (M+DR-chrom+M-rigid-black)||1962||3000
|-
|1961001||1964000||Summicron f= 5 cm 1:2 (M-rigid-chrom-11818)||1962||3000
|-
|1984401||1988000||Summicron f= 5 cm 1:2 (11118)||1963||3600
|-
|2031001||2033000||Summicron f= 5 cm 1:2 (M-rigid-black+M-DR-chrom)||1964||2000
|-
|2036001||2037000||Summicron f= 5 cm 1:2 ||1964||1000
|-
|2052001||2054000||Summicron f= 5 cm 1:2 ||1964||2000
|-
|2091501||2093500||Summicron f= 5 cm 1:2 (M-rigid+DR-chrom)||1965||2000
|-
|2095501||2097500||Summicron f= 5 cm 1:2 ||1965||2000
|-
|2106801||2108800||Summicron f= 5 cm 1:2 ||1965||2000
|-
|2114551||2117550||Summicron f= 5 cm 1:2 (M-DR)||1965||3000
|-
|2139951||2142950||Summicron f= 5 cm 1:2 (M-rigid-chrom)||1965||3000
|-
|2159001||2161000||Summicron f= 5 cm 1:2 (M-DR+M-rigid.chrom)||1966||2000
|-
|2180901||2182900||Summicron f= 5 cm 1:2 (M-rigid-chrom)||1966||2000
|-
|2228301||2229300||Summicron f= 5 cm 1:2 (M-rigid+DR-chrom)||1967||1000
|-
|2233801||2235800||Summicron f= 5 cm 1:2 (M-rigid+DR-chrom)||1967||2000
|-
|TOTAL||ASSIGNED||SERIAL NUMBERS ||1951-1967||253,314
|-
Serial numbers compiled from [http://www.imx.nl/photo/downloads/files/leicapocket_pod1.pdf Puts Pocket Pod]<br>
.* Lens 1628616 is black Elmar 3.5/5cm head with iris diaphragm, no focusing mount<br>
.** Lens nos. 1950022 & 1950025 are M-2/50 DR<br>^ Lens 1176510 is Summaron 3.5 cm 1:3.5 (M)<br>
^^ Lens no. 1571311 is Summicron 3.5 cm 1:2 (ELW.M-chrom)<br>^^^ Lens 1363725 is Elmar 5 cm 1:3.5 (RS) 
|}
Lens superseded by [[Summicron (II) f= 5 cm 1:2]]