@Vlachos,
Le numéro de série du lux pre asph 50mm que je recherche doit être supérieur à 1844001 pour être de type 2 ou 3.
Voici l'historique du caillou (
http://www.rangefinderforum.com/forums/ ... 29584.html):
"There are three different optical formulas of this lens:
50mm F1.4 Summilux 1959-1961 - Type 1 SN#1,645,300-1,844,000
This version was only made for two years and was replaced by Type 2 which featured a new optical computation and increased performance (especially at 1.4).
50mm F1.4 Summilux 1962-1994 - Type 2 SN#1,844,001-N/A
This is the most common version of the Lux. This optical formula was in production for over 40 years until the arrival of the ASPH model and is very, very good. This version with the clip on hood focuses as close as 1 meter (100cm).
50mm F1.4 Summilux-M 1995 - 2005/6 - Type 3 SN# ???
Same optical formula as Type 2, but a built in collapsible hood (which doesn't lock in place!:bang: ) and now focuses to .7 meters (70cm). This is the version I have and I prefer the ability to focus closer. Performance is identical to Type 2.
50mm F1.4 Summilux-M ASPH 2006 - present Type 4 SN# ???
A totally new optical formula with ASPH technology and a floating element for increased close focus performance. Reportedly this is the highest performing 50mm lens ever made for 35mm photography. Cost: circa $2700 dollars."
Merci beaucoup,
Cordialement