Wide-angle fast lens with a T* multicoating and agle of view 90° that perfectly suits a landscape work.
Carl Zeiss Biogon T* 2.8/21 ZM has a nice bokeh. It’s very sharp at all aperture values and has a nice gradient vignetting. There is no noticeable distortion. As most of ZM-lenses it is nicely flare-resistant.
Carl Zeiss Biogon T* 2.8/21 ZM is a no compromise solution at its focal length and even dominate best lens from great and terrible Leica that costs about 4400usd, Elmarit-M 21mm f/2.8 ASPH.
There is only lens itself in a set. A viewfinder and the lens hood can be bought separately.