The only problem with the lens is that you had to use it on the G series. I had two G1's which were great. Like a fool, I traded them for G2's. Endless problems, under warranty, that kept recurring. I ditched the whole system out of frustration.
Sadly, like just about everybody who bought into the G series. At times I've thought the 'G' in the G1 stands for aGgravation...
The G1 and G2 were classic one-trick ponies. In almost everybody's experience those cameras often notoriously malfunctioned even during the warranty period. As good (and they are good) as the G Zeiss lenses are, they don't seem to adapt well to digital use even with an (expensive) adaptors. I know several who went digital with the lenses, all complained about peripheral problems - fringing, odd colors, wayward exposures. it seems the Zeiss Gs were not designed for 21st century digital camera use.
As for the cameras, well, Both my G1s work well but one occasionally won't rewind a film. I've figured out a way to do it by hand, but I need to have a film loading bag with me if my emergency steps fail in the bush or wherever I am. Not an ideal way to go about picture-making.
Recently I lucked into a find for repairing G1s. Someone in Singapore still does them (or at least did mid-2023), but as expected will offer no guarantee on the work, no spare parts being available. Thanks for nothing, Contax.
I still have two G1s and four lenses (21-28-35-90). I could have sold out a few years ago for good money, but instead I opted to dump the one lens I should have kept, the 45. My mistake.
Now and then I unfreeze a couple of rolls of old 35mm film and take a G1 out for an airing. If only to keep it alive and reduce the pile of unloved films in my fridge. I find the images I make with film are much like those I do with digital, but at higher cost when I factor in film processing and scanning. My G1s are now so old, inevitably I worry about if and when the camera will cark on me while I'm focusing it at some pretty landscape. Which is all I seem to be using them for these days.