Not really - the necessary information isn't being presented to the body.
On the "A" lenses, the "A" signal pin doesn't mechanically make contact with the body unless the aperture ring is in the "A" position. On the later lenses (F & FA) the pin is always in contact, but it is electrically isolated unless the aperture ring is in the "A" position. If the body doesn't see the right signal on the "A" pin it doesn't even attempt to read anything from the other signal pins. On Sun, Oct 08, 2006 at 08:20:09PM -0400, Adam Maas wrote: > > I just checked and you are correct, at least with the K100D. It is odd > however, as the necessary info is present. > > -Adam > > John Francis wrote: > > I don't believe that's correct. > > When you turn an "A" lens off the "A" position, you lose > > multi-segment metering (not Matrix Metering, which is a > > trademark owned by a different camera company :-). > > I think that's also true of the F or FA lenses, but must > > admit that I haven't checked. > > > > > > On Sun, Oct 08, 2006 at 05:05:20PM -0400, Adam Maas wrote: > >> You can use the aperture ring with A, F and FA glass, just with almost > >> all the limitations of K glass (You keep Matrix Metering, but lose AE > >> and have to stop-down meter). > >> > >> -Adam > >> > >> > >> David Bliss wrote: > >>> Tim, > >>> > >>> Thanks for the welcome, I appreciate it. :) I feel bad for having set > >>> off > >>> a landmine of ranting without knowing it... > >>> > >>> I'm disappointed that the K10D hasn't readded the aperture linkage, but > >>> I suppose I can tranfer my hopes to the K1D for a while anyway. > >>> > >>> I guess the question I REALLY meant to ask was: what, if anything, does > >>> dpreview's assertion that you can "use lens aperture ring" mean, > >>> since it clearly doesn't mean what I think it means? Even on A lenses, > >>> I for one would much rather set the aperture using the lens aperture ring, > >>> with a nice big custom-designed control, than use a stupid fiddly knob on > >>> the camera body -- just like when doing manual focus I want to use the > >>> lens focus control and not twiddle a potentiometer like on one of my old > >>> Sony cameras (and most non-pro video cameras). > >>> > >>> Thanks, > >>> david > >>> > >>> PS: Apologies in advance if you get a duplicate copy of this message; my > >>> MUA > >>> is acting up. > >>> > >>>> David? David? Still there ;-) > >>>> > >>>> I have already welcomed you once. But as this thread turned out I think > >>>> it > >>>> is appropriate to welcome you to this world of lunatics one more time. > >>>> It is > >>>> a soap opera, with live characters, and it is free. > >>>> > >>>> As you can see, asking a simple question here can be a rather mixed > >>>> experience. But within the shouting, you may find an answer to your > >>>> question. > >>>> > >>>> > >>>> > >>>> Tim > >>>> Mostly harmless (just plain Norwegian) > >> > >> -- > >> PDML Pentax-Discuss Mail List > >> [email protected] > >> http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
