[Klaus]

Nope. I confirm my statement: it is indeed disappointing given the price point and the marketing message conveyed by Zeiss. Their very site states "The best standard lens in the world". Slightly pretentious isn't it?

Now, by reading this, you would expect their QC to be unmatched, especially given the ridiculous price they charge for it. However, it's not quite the case. The last 3 lenses below are easily ahead of it while being much much cheaper:

• Zeiss 55mm f/1.4 Otus => 6.5
  
• Nikon 58mm f/1.4 => 6.7
  
• Zeiss 50mm f/2 Makro => 7.3
  
• Sigma 50mm f/1.4 Art => 7.5
  
• Canon 50mm f/1.8 STM => 9.3
  

Ironically, it's the cheapo Cannon 50 STM that leads the packs.

From a customer point of view, if I pay extra for "the best" quality, I'd also expect premium QC, better than any other lenses. Clearly, it's not the case here.

 

Actually I am not surprised that the 50 STM leads the packs. It is the slowest lens in this series.

The slower a lens is the more robust is it against decentering.