Sorry but I must be in the minority in that I dont like the Voigtlander adapters, the 2 I have are poor quality. The idea of chroming the brass of these adapters is that the brass is soft and the chrome plating is hard to prevent wear. The 2 Voigtlander adapters I have, have the brass showing through. When machined to the required 1mm thickness they have machined through the chrome to reveal the brass. If it had of been on the lens side it wouldn't have been as bad as it remains on the lens usually but no its on the mount side, the very very face that needs the chromed plating as that's where most wear occurs. The exposed brass also starts to oxidise. I go with other brands instead as I feel this is not acceptable.