Hi. I'm new to NEX cameras, and I tried to use an older Carl Zeiss Jena 135/2.8 lens with an adaptor. Everything worked fine but I could not take any pictures since the camera displayed a message saying that the lens was not recognized. I could not circumvent that condition and I'm here now asking for help. I am using the same lens with my Canon 7D and an adaptor and it works great in manual mode, what did I do wrong with the NEX? Thanks.