A summary of the various version of Noctilux according to my resource books...
Version 1
Code: 11820
Focal length: 50mm
Aperture: f1.2 to f16
Filters: Series VIII and E48
Hood: 12503
Min. focus distance: 1m
Weight: approx. 470g
Lens design: 6 elements in 4 groups
Year: from 1966 to 1975
Serial no.: 2,176,701 to 2,557,550
Version 2A
Code: 11821
Focal length: 50mm
Aperture: f1 to f16
Filters: E58
Hood: 12519
Min. focus distance: 1m
Weight: approx. 580g
Lens design: 7 elements in 6 groups
Year: from 1976 to 19??
Serial no.: 2,749,631 to 2,919,656
Version 2B
Code: 11821
Focal length: 50mm
Aperture: f1 to f16
Filters: E60
Hood: 12539
Min. focus distance: 1m
Weight: approx. 580g
Lens design: 7 elements in 6 groups
Year: from 19?? to 19??
Serial no.: 2,919,656 to 3,220,708
Version 2C
Code: 11821
Focal length: 50mm
Aperture: f1 to f16
Filters: E60
Hood: 12544
Min. focus distance: 1m
Weight: approx. 580g
Lens design: 7 elements in 6 groups
Year: from 19?? to 1994
Serial no.: from 3,220,708
Version 3
Code: 11822
Focal length: 50mm
Aperture: f1 to f16
Filters: E60
Hood: built-in hood
Min. focus distance: 1m
Weight: approx. 630g
Lens design: 7 elements in 6 groups
Year: from 1994 to 2008
Serial no.: from 3,617,898 to 3,985,701
Version 4
Code: 11602
Focal length: 50mm
Aperture: f0.95 to f16
Filters: E60
Hood: built-in hood
Min. focus distance: 1m
Weight: approx. 700g
Lens design: ASPH, 8 elements in 5 groups
Year: from 2008 to current
Serial no.: from 4,XXX,XXX to X,XXX,XXX
It will be interesting if CSer can pose some good picture of their beautiful Leica Noctilux with Leica hood here...
Let's show us your Leica Noctilux....:lovegrin: