The Zeiss Tele-Tessar T* 85mm f/4 ZM lens is now discontinued in Japan (production completed). The lens is also listed as discontinued at B&H Photo: Currently, there are 18 different Zeiss ZM lenses in stock at Adorama and B&H Photo (some of them are just different finishes of the same model).
Here is another review by Jack Takahashi – this time of the Zeiss Tele-Tessar T* 4/85 ZM lens for Leica M-mount (see his previous reviews):
The Zeiss Tele-Tessar T* 85mm f/4 ZM lens for Leica M-mount is now $150 off at B&H Photo and Adorama – both the black and silver versions are available:
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