Rob Studdert wrote : ----------------- On 17 Dec 2002 at 0:15, Scott Nelson wrote:
>> Has anyone tried this before? I'm curious, but I think the second >> option would be much easier to implement and is reversible. Oh yeah, >> and does anyone have any beat up, broken A series lenses with f/2.5 or >> f/2.8 maximum apertures? > PDMLer Mark Roberts has produced a template and will modify lenses, one of our > French PDMLers has a web page dedicated to the discussion and Boz's KMP has > quite detailed information regarding the mount code combinations and theory. > I have also modified K and M lenses to replicate KA contacts in the past with > success. > > Cheers, Hi, I am a bit confused about what is being discussed here. In my understanding (which may be wrong of course) the A-lenses' current circuit is only closed when the lens is set to the "A"-position, i.e. when the "A-contact" of the lens is protruded (as opposed to F and FA lenses). It is thus my understanding that multisegment metering only works with A-lenses when they are set to the A-position. So just adding the plastic insulators to a K/M lens, according to the code given on Boz' page would not make much sense (as the camera's A-contact is recessed and does not (and should not) connect with the metal lens mount of the K/M lens). Multisegment metering would only work in manual mode with an A-lens or with an K/M lens if the camera's lens mount is current carrying even if the "A-contact" is not connected. Is this the case? Alexander > > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com
