On Tue, Jan 16, 2007 at 05:33:22PM +1000, jim wrote:
> On Mon, 15 Jan 2007 16:18:01 -0500, John Francis wrote:
>
> >That depends on what the camera does. ShowTags just reports what the
> >camera has put in the various fields. If the camera fills in the
> >focal length (which I believe the K10D does if shake reduction is on)
> >then that will show up.
>
> It didn't with an old 400mm screw mount lens and an A 135, tho camera did
> ask for the focal length.
It doesn't show up (or shows up as zero) in the MakerNote tags,
but in the examples I've seen the focal length is showing up in
the EXIF tags.
> A firmware change will see to that. I'll get pentax to change it for
> me................ :P
>
> I have been looking at the AF lens contacts and I think what most people call
> the digital signal pin is infact power for the lens circuity.
> the mount it self is ground or negative. The A pin remains the same. 2 aren't
> used, so that leaves 3 pins left.
> It is those 3 that would have at least Serial data, serial clock and maybe a
> reset.
> Not sure tho cause I don't have a logic analiser.
> Got that info from tracing circuits on a busted sigma lens.
>
> James
The best place to go for this kind of information is Boz's K-mount pages:
http://www.bdimitrov.de/kmp/
In particular, for details of the various lens contacts, see:
http://www.bdimitrov.de/kmp/technology/K-mount/index.html
The digital signal pin was introduced with the K(AF) mount:
http://www.bdimitrov.de/kmp/technology/K-mount/kaf.html
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
