Michel Carr�re-G�e <[EMAIL PROTECTED]> wrote: >Mark Roberts a �crit: > > Joe Wilensky <[EMAIL PROTECTED]> wrote: >..... > > I believe the screw-mount adaptor insulates the contacts in the lens > > mount so the camera acts as if there's no lens attached. Apparently, > > those who use screw-mount lenses on AF cameras can insert a piece of > > aluminum foil to overcome this problem. I've had this same trouble with > > a couple of third-party MF lenses that have lens mounts with black > > anodized (non-conductive) finishes; no autofocus confirmation. >Yes I have this problem with a black mount Cosina 2/50. I scraped the >painting to permit the electric contact, so focus-aid works !
That's what I did with my Cosina 200/4.0 (which is a surprisingly good lens). -- Mark Roberts Photography and writing www.robertstech.com
