The question is how the Rollei 50mm 1.8 compare with the Zeiss 50mm 1.7 I have been reading about both lenses and understand that the Rollei HFT coating is similar to the Zeiss T coating. I also know that early Rollei lenses were made in Germany but since 1975 they were made in Singapore. The Rollei costs almost half as much as the Zeiss. In optical performance, would a good sample from both be equal? I have the adapter for the Rollei to use is on a Canon 5D and keeping an eye on the prices.