There's no digital pin on any A lens anyways. Only the F, FA, D-FA and DA lenses have it.
-Adam On Sun, May 17, 2009 at 8:10 PM, P. J. Alling <p_all...@hotmail.com> wrote: > The K20D can't get anything from the A*300 or any other lens if mounted > using the AF 1.7x, there's no pass through for the digital pin. There's no > digital pin on the A*300 in any case. Now the AF 1.7x might be supplying > some kind of focal length information but it would be erroneous, since it > has no idea what the focal length of the mounted lens is either, (the A > contacts don't pass that information). > Joseph McAllister wrote: >> >> This might be why my K20 did not ask the focal length of my A* 300 ƒ4 when >> attached to the AF 1.7x tc. It should have, but perhaps it DID get something >> from the 300 as to focal length. Of course, the photos were soft on tripod, >> so maybe I should have gone to the Custom Functions and forced a 500mm >> reading. (There was camera movement, as the tripod was not my sturdiest) >> >> On May 17, 2009, at 12:14 , Adam Maas wrote: >> >>> but also impractical to >>> evaluate all F and later lenses (A and earlier lenses don't identify >>> the model to the camera and therefore couldn't support the feature >>> in-camera) >> >> Joseph McAllister >> pentax...@mac.com >> >> http://gallery.me.com/jomac >> http://web.me.com/jomac/show.me/Blog/Blog.html >> >> >> >> >> >> >> -- >> 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. >> >> > > > -- > -- > > The free man owns himself. He can damage himself with either eating or > drinking; he can ruin himself with gambling. If he does he is certainly a > damn fool, and he might possibly be a damned soul; but if he may not, he is > not a free man any more than a dog. > > --G. K. Chesterton > > > -- > 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. > -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- 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.
