No Zeiss ZM lenses beyond 50mm: why?

[pedaes]

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52 minutes ago, J.Nordvik said:

Only the M-lenses are made/ assembled in a Leica owned factory (Portugal). Are all other lenses sold by Leica "giving the names" to other manufactures design?

Some M lenses are made in Wetzlar. I think S and SL lenses would be in-house, or between the two houses.

[J.Nordvik]

http://www.fdtimes.com/wp-content/uploads/2017/02/80FDTimes-LEICA-PortugalFactoryTour.pdf

This is all I have for information. I can only speculate from here. And I will guess that Leica do not make any AF lenses in their own factores in Germany or Portugal.

[J.Nordvik]

PS: Many camera brands do not make all the lenses in their own factories. Olympus, Pentax and Sony do not. Canon, Nikon and Fuji maybe?

[verwackelt]

And who makes the SL lenses if they are not fabricated in Germany or Portugal?
Panasonic in China?

[J.Nordvik]

I do not know. Certainly not in Germany og Portugal.

[jaapv]

Leica controls the design tightly, irrespective of manufacturer. 

[nicci78]

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Every Leica lenses are made in Wetzlar Germany with parts from their Portuguese factory. 
Except five TL lenses which are made by an unknown Japanese manufacturer. 

Panasonic Leica co branded lenses are not Leica lenses at all. Just a marketing scheme with a barely relevant certification from Leica consultants dispatched in Japan and China. 
Same for HuaWei and Insta360 + Leica co branded lenses. Just pure marketing with minimal intellectual exchange. 
So don’t be fooled. Just buy the real stuff, with made in Germany label. 
 

NB : some M lenses are assembled in Portugal. Just to avoid US tariffs on German lenses . But it is only for US market