I know that. Joe was talking specifically about the A*300 F4.0. Just
as important the AF adapter has no pass through for the digital pin
rendering the existence or lack of a digital pin on the lens used moot
no matter what series it is..
Adam Maas wrote:
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 <[email protected]> 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
[email protected]
http://gallery.me.com/jomac
http://web.me.com/jomac/show.me/Blog/Blog.html
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