Originally posted by clackers I'd say that they pretty much only have a Zeiss label on them, Wpresto.
The Sony Zeiss lenses are made by Cosina.
Some if not all lenses labeled "Voigtlander" are or were made by Cosina, several of these are outstanding, and some discontinued models are legendary for both mechanical and optical excellence (125mm macro and several others in the same series). I am not a member of the school who believe that the brand name on a product is an automatic indication of quality, either exceptionally good or marginally acceptable. Lenses, just like people, should be judged as individuals. Regardless of whether the zoom on my Sony is labeled Zeiss, Sony, Tokina, Pentax, Laowa, Zoomatic, or Cokebottlerecyclon, it is a very good lens.