Carl Zeiss will announce Zeiss 55mm f/1.4 Distagon T* lens at Photokina 2012. This lens will come for both Nikon and Canon mount. And will be in stock in most stores in early 2013. This lens was also shown up at CP+ Show 2013 in Japan.
“Thanks to a newly developed optical design, this lens is superior to conventional full-frame lenses, and it achieves with powerful full-frame, full-format cameras an image performance that until now has only been seen with medium-format systems. The first prototype of this new range will celebrate its world debut at photokina. The family of lenses is expected to be on the market in the second half of 2013 for EF bayonet (ZE) and F bayonet (ZF.2).” -Zeiss Press Statement