Although the use of old Contax / Yashica lenses on Canon EOS bodies is relatively common, some exotic combinations of lenses and bodies are little documented. I have now had some experience adapting these lenses and I can report the results, unfortunately not enthusiastically.
| Camera | Lens | Result: mirror | Result: meter |
| EOS 5 | Carl Zeiss Tessar 45/2.8 | hits the lens | off about 1-1.5 EV |
| EOS 5 | Carl Zeiss Sonnar 135/2.8 | hits the lens | off about 1-1.5 EV |
| EOS 1n | Carl Zeiss Tessar 45/2.8 | hits the lens | OK |
| EOS 1n | Carl Zeiss Sonnar 135/2.8 | clear | OK |
By the way, the EOS 5 has the undeniable advantage of a very silent operation over EOS 1n. Besides this, the 1n is clearly a better camera.
