I am about to purchase a Zeiss Otus 55 f/1.4 ZF.2 for Nikon. Since I shoot only Canon, switching to Nikon is not an option. Novoflex has an adapter, but it lacks the chip necessary for focus confirmation. Fotodiox has a chipped adapter and I also found adapters from Leitax. What I need and like to know is: -What is the best adapter in terms of mechanical fit and build quality and focus reliability -How well does the "green dot" work with these Nikon lenses, how often is focus off and how reliable is it? How much does it depend on the (amount of) light? Please share experiences!