[photo-3d] Number 235 "Depthmaster"

[Jacques Cornet <jacques.cornet@xxxxxxxxx>]

Ken Burgess came back on the subject: Depthmaster Autofocus
>
>I've just read and interesting blurb on the Grayflex Stereo Graphic camera
which I quote here:
>
>"The lens system in the Stereo Graphic is called Depthmaster Autofocus,
and consists of a unique setting of the two lenses that provides sharp
focus throughout the entire scene without any adjustment on the part of the
operator."
>
>Shall I go on?
>Well OK...
>
>"The lenses are so positioned that one lens produces sharpest detail
through the entire foreground range in one picture, while the other lens
produces equally sharp detail in the middle distance and background of the
other picture of the stereo pair. Thus when the pictures are viewed in a
stereo viewer the scene appears sharp from foreground to infinity."
>
>Does this actually work? If so it sounds like Graflex was on to
something...  I'm thinking about getting one of these, anyone care to
compare the quality of the camera and images to a (focused)  realist?  From
the positioning of the viewfinder it looks like it might exhibit some
serious parallax.
>
>Ken
>
I know that that question already appeared in P3D. But I would like to add
that I have a Kodak Stereo (S/N 049080) that we used "professionaly" in the
sixties. Our laboratory checked the lenses... and came to the same result:
discrepancies between right and left. We went to Kodak Brussels to
complain... and received the same response as the one stated above : it was
to get more d.o.f... We were happy with that and just commented "how clever!"