The Zeiss 135mm f/2.0 Apo-Sonnar ZF.2 lens (F-mount) that was announced during Photokina is now available for pre-order. The expected availability is February 28, 2013. Detailed specifications of the lens can be found here.
The Zeiss Distagon T* 15mm f/2.8 ZF.2 lens is currently in stock.