Upload & Sell: Off
have a few CY lenses already, I wonder if it is worthwhile to go down the ZE/ZF route for other focal lengths or stay with CY glass.
Congrats with your 5D -- it's the most affordable camera that does justice to Contax lenses. About Z* lenses: a couple of them overlap with the Contax line and with them there still are some small opticall differences. Perhaps the differences are the smallest in the 21/2.8 and that's probably why the C/Y version of that lens on the used market is as expensive or even more expensive than the ZE/ZF version. Overall there are more affordable models in the C/Y line (28/2.8, 35/2.8, 50/1.7, 50/1.4, 85/2.8, 100/3.5, 100/2.8, 35-70/3.4, 28-85/3.3-5.6, 80-200/4 I have all seen for good prices). The Z* line has mostly consists of the premium models, the 50/1.4 and 25/2.8 being the only exceptions and the 35/2 and 28/2 being in between perhaps.
FWIW, I find the ergonomics of C/Y lenses nicer than ZF (smoother and easier to use aperture ring, more pleasant focus ring that turns in the right direction).