Nikon SLR Cameras

What is the defocus control ring on old Nikkor lens?

Guest
Guest

What is the "defocus control ring" on old Nikkor lens?

Jens
Jens

It has subtle effects on how strong the loss sharpness due to shallow of depth of field in front or behind the subject will be.

It's quite a high quality lens that you got there. Here you can read more about it:
http://www.stacken.kth.se/~maxz/defocuscontrol/