BradS Member Joined Sep 28, 2004 Messages 8,120 Location Soulsbyville, California Format 35mm Jan 24, 2021 #1 Talking about the modern, made in Japan, Zeiss ZM branded lenses (for Leica M mount)... Some have serial numbers starting with 51 but most have serial numbers starting with 15 - even for the same model lens (eg, 50mm f/2 Planar). I thought I read some explanation for this but I cannot find it any more (and my memory is spotty). Does any body know what the different prefixes signify? TiA. Last edited: Jan 24, 2021
Talking about the modern, made in Japan, Zeiss ZM branded lenses (for Leica M mount)... Some have serial numbers starting with 51 but most have serial numbers starting with 15 - even for the same model lens (eg, 50mm f/2 Planar). I thought I read some explanation for this but I cannot find it any more (and my memory is spotty). Does any body know what the different prefixes signify? TiA.