The Giant Sunflower was shot with the legendary Carl Zeiss Olympia Sonnar 180mm f2.8 lens for the Contax/Yashica mount, Made in West Germany in 1987.
The Sunflower was partly shot with the Olympia Sonnar adapted to a Sony a7ii full-frame camera
The Zeiss Mutar II 2x Tele-Converter was inserted between the Carl Zeiss 180mm f2.8 lens with Contax/Yashica mount and the adapter between Contax/Yashica-mount and Sony e-mount. The usage of the Zeiss Mutar doubles the focal length from 180mm to 360mm.
The remaining Sunflower photos were shot with the Olympia Sonnar Carl Zeiss 180mm f2.8 lens adapted to a Sony a6100 APS-C camera
When the Olympia Sonnar Carl Zeiss 180mm f2.8 German is used on a Sony a6100 camera with an APS-C sensor, a crop-factor of 1.5 applies. That makes the field of view almost the same as a 270mm lens used on a 35mm equivalent full-frame camera like the Sony a7ii.
When you click on a photo in the galleries, following buttons will allow you to select some features, including a slideshow or to view in original size of 24 mega-pixel resolution:
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Sophisticated Carl Zeiss Mutar II 2x Tele-Converter
On the Sony a7ii full-frame camera, the Olympia Sonnar Carl Zeiss 180mm f2.8 lens was used with the T*-coated Carl Zeiss Mutar II 2x tele-converter which is inserted between lens and the mount-adapter to double the focal length.
For Contax lenses with smaller focal length, Zeiss recommends to use the T*-coated Mutar I tele-converter. The Carl Zeiss Mutar II tele-converter is optimized for Contax tele-lenses with longer focal length.
In my view, the image quality and very creamy bokeh which is typical for Sonnar lenses does not get lost, when shooting the super-sharp Olympia Sonnar Carl Zeiss 180mm f2 lens with the sophisticated Mutar II 2x tele-converter adapted to a Sony a7ii full-frame camera, as you can see in above gallery photos. The in-body stabilization of the a7ii was set to 350mm focal length.
Zeiss is even going so far, to make the impression that the image quality of Carl Zeiss T* Contax lenses when using the Mutar T* tele-converters should be comparable to the original Contax lens (German quote: “Bei Kombination von Mutar T*I (2X) oder Mutar T*II (2X) und Carl Zeiss T*-Objektiven wird eine Bildqualität vergleichbar derjenigen des Objektivs allein erreicht“).
Shooting the Olympia Sonnar Carl Zeiss 180mm f2 lens adapted to a Sony a6100 APS-C camera, works also well regarding image quality and creamy bokeh. This Sonnar lens deserves a test adapted to cameras with higher resolution sensors like the 42 mega-pixel on a Sony 7Riii.