Very well put. But please explain why every AF sigma lens I have doesn't show the correct apature range on my super A. despite haveing some A contacts. Also why does the MZ60 have only 2 contacts missing when it was never designed to use A lenses at all. Why does the sigma lens when I pulled it apart have all contacts except for the * go via a flexiable circuit trace to a board in the lens when all that is required of A contacts is to be shorted or open? If what you say is true, then the MZ60 should only have the digital pin which it doesn't. It is very easy electronicly to make any contact on a F or newer lens to to have duel function As I said. only pentax knows what is really going on. every one else including me is only guessing even Boz. When I alerted Boz to the very limited MZ60, even he asked what do the other contacts do. so far, noone can answer.
James On Tue, 06 May 2008 08:04:00 -0400, P. J. Alling wrote: >It's not conjecture that lenses without the pin are identified by Pentax >DSLRs as A lenses ,and if the pin is blocked the camera shows the same >behavior. The other connections are simply conductive on non conductive >spots on the lens mount.on A lenses Even if digital pin simply powers >the chip the effect is the same, without power the lens becomes "dumb". >However there's no particular reason to make any of the previously >existing pins part of the digital communication path and every reason to >not do that if you care about backward compatibility as it might break >the "A lens protocol". -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
