I only found out about the 40/2 after I ordered the Zeiss 35/2 - otherwise I probably would have got it. I think they really are underrated lenses - and like you said they are manufactured in Japan by Cosina -who are also contracted out by Zeiss to make their lenses. You can tell when you have it in hand, feels every bit as well built as the Zeiss line and the optical quality beats the pants off most of the AF 50mm offerings.