Arthur Nogood
Fixing Zeiss 25mm 2.8 ZF couldn't focus at infinity problem
Now I had the lens group and barrel detached, like Nikon 55mm 2.8 micro, Zeiss 25mm 2.8 ZF has multiple helicals that control different groups of lens to move oppositely during focusing, that mechansim is known as floating lens, to achieve great result at both farest and nearest ends of the focal range. But if assembled wrongly, it then turned out to be a disaster, and it is not infrequent.
Fixing Zeiss 25mm 2.8 ZF couldn't focus at infinity problem
Now I had the lens group and barrel detached, like Nikon 55mm 2.8 micro, Zeiss 25mm 2.8 ZF has multiple helicals that control different groups of lens to move oppositely during focusing, that mechansim is known as floating lens, to achieve great result at both farest and nearest ends of the focal range. But if assembled wrongly, it then turned out to be a disaster, and it is not infrequent.