Re: [photo-3d] Re: Digital twins

[Gromit <gromit@xxxxxxxxxxxxxxxx>]

I'm working with a pair of Canon A5 units.  They are kind of "old" and 
low-res in the digital world ('98 and 1024/768), but I had good reasons to 
select them.  They are small, they have been reliable for me, I have other 
Canon digitals that I can share parts and supplies with, 1024/768 is as 
large as I can really work with right now, and they have become inexpensive.

I looked at building with Minolta Dimage 1500s but couldn't afford the base 
cameras.  I considered using Dimage Vs (that I could afford), but dropped 
the idea when I started considering the "housekeeping" costs.  AA batteries 
instead of the Canon packs that I already own.  Smartmedia card reader 
instead of the CF ready I now have.  Extra smartmedia that none of my other 
cameras use.  The costs just got too high.

The Canon A5 doesn't have a remote like the Olympus and Casio models.  I 
plan on reaching inside the skin to solder an external jack into the 
shutter relase button.  Then my external, synch tirggers can be 
disconnected for packing. My goal is to be able to trigger a pair of 
cameras off of a pair of DPST switches.  One switch (push on, push off) to 
do the "half-press".  Another (momentary) to do the final shutter release.

The problem I ran into last night is that in each camera, the CCDand lens 
is in slightly different allignment with respect to its base plate.  When I 
place both on a flat surface, point and shoot, the images are not 
vertically alligned.  The best idea I can come up with is to build two 
false base plates (one for each) to shim the camera bodies out of 
allignment so that the lenses and CCDs will be correct.

I was most disappointed last night to make this discovery.  I had hoped 
that I would be able to build a twin rig with an easily adjustable 
base.  Something that I could hand hold with a 70mm base, or tripod mount 
with a 110+ base.  Designing in base shims that are removeable (to get to 
batteries) and unique to each camera body will complicate the project.  If 
anyone has any wisdom to offer, I'm listening.

John Thurston
Juneau, Alaska

>I've selected the Casio QV-2800UX to attempt twinning since it has
>remote and appears one might be able to disconnect the lens element
>for remote placement. Camera is just becoming available in Canada.
>Bernd
> > All of my stereo work is
>done
> > digital and viewed on a computer display.  Does anyone else on the
>list
> > share this interest?