[Steinar1]

[quote name='Rainer' timestamp='1304844326' post='8127']

Actually, adapting FD to Nikon makes the situation even worse:



Look at the register distances:

FD: 42mm

EF: 44mm

Nik-F: 46.5mm



So, you already need to compensate 2mm plus adapter thickness when adapting to EOS/EF ... but you

have to compensate the additional 2.5mm on top of that to adapt to Nikon.



This means, the Adapter will even more act like a TC, and it will even more reduce the image quality.



If you want to maintain the image quality of the lens, you must adapt to a system with a

register distance shorter than 42mm ... e.g. 4/3rds.



Just my 2cts...Rainer

[/quote]



Thanks again Rainer for bringing me back on the straight and narrow <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' /> ! What does it mean in practical terms to loose focus to infinity. You focus up to a certain distance I guess and then you loose the focusing ability? Are there any rules about how far out you loose the focusing?<img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/unsure.gif' class='bbc_emoticon' alt=':unsure:' />