From the current Lens Newsletter that I just received from Carl Zeiss:

Carl Zeiss SLR Lenses Now Available for K Bayonet

Good news for 35 mm SLR (Single Lens Reflex) enthusiasts. The successful SLR
line of lenses is continuing to grow. Different camera mounts are making the
prized optics attractive for an increasing number of SLR photographers.
These premium lenses with manual focusing are now also available for the K
bayonet. They are sold under the name of ZK Until now, Carl Zeiss SLR lenses
were already available for the F bayonet (ZF) and the M42 screw threads
(ZS).

SLR lenses from Carl Zeiss are known for their outstanding image quality and
precise, long-lasting mechanical parts. This has been enabled by the growing
known-how and the latest technology: for the design of its SLR lenses, Carl
Zeiss draws on more than 100 years of experience in camera optics.

The ZEISS SLR lenses with the ZK bayonet contain transmission elements based
on the KA standard and thus permit the utilization of shutter priority,
aperture priority and programmed auto exposure on all camera models with
these features.

Initially, the Distagon T* 2.8/25 and 2/35, Planar T* 1.4/50 and 1.4/85 as
well as Makro-Planar T* 2/50 and 2/100 will be offered for the K bayonet. In
the future, further additions to the line of SLR lenses will provide
demanding photographers with an even larger selection of manually focusable
fixed focal lengths for their work. Prices for these premium optics range
from 500 to 1350 Euro (excl. VAT). The first lenses will be available in
August.

Precise focusing is the decisive factor for optimum results in practically
all areas of photography. SLR lenses from Carl Zeiss offer considerable
advantages over lenses with autofocus, particularly for landscape, macro,
portrait, night and architectural images. For practical use, the large
rotary angle and the absolute freedom from play of the focus ring simplify
exact focusing on the details important to the image, which also makes the
performance of the lens visible in the resulting picture. This allows
photographers to better implement their creative ideas and better accentuate
details in the image as the main subject can be clearly emphasized against
its surroundings.