All the lenses were previously used on a Canon DSLR via a Contax / Yashica to Canon EOS adapter. They were mounted on the Sony NEX-5 using an EOS to NEX E-mount adapter. The direct way would be to use a Contax/Yashica to NEX E-mount lens adapter.
Here are the lenses mounted on the NEX and sample snap shots at wide open aperture and stopped down at f/5.6. These images are straight jpgs out of the NEX-5.
The first lens is the Contax Zeiss 28mm Distagon with a maximum aperture of f/2.8. This is a great landscape lens at a bargain.
Sony NEX with Contax Zeiss 28mm f/2.8 Distagon
Contax 28mm Distagon at f/2.8
Contax 28mm Distagon at f/5.6
The second lens is the Contax Zeiss 50mm Planar with a maximum aperture of f/1.4. The perfect normal lens, dreamy wide open at f/1.4 and tack sharp stopped down.
Sony NEX with Contax Zeiss 50mm f/1.4 Planar
Contax 50mm Planar at f/1.4
Contax 50mm Planar at f/5.6
The third lens is the Contax Zeiss 85mm Planar with a maximum aperture of f/1.4. The perfect portrait lens, dreamy with creamy bokeh wide open and tack sharp at smaller apertures.
Sony NEX with Contax 85mm f/1.4 Planar
Contax 85mm Planar at f/1.4
Contax 85mm Planar at f/5.6
The announcement of Carl Zeiss joining the Sony E-mount system with their rumored 24mm f/1.7 lens was great news to us. We are hoping that other Carl Zeiss lenses optimized for the Sony NEX are being developed.