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Just recently we've had a couple of discussions on creating B&W prints
or slides from colour stock, but I just came across this interesting
process from the turn of the century, whereby a Russian photographer
was able to project B&W glass plate photographs in true colour

It was done by shooting with a custom camera that had three lenses
mounted one above the other, which created three frames of the same
scene on a glass plate. Each of the lenses had a different coloured
filter, red, green, blue. The glass plate was then displayed using a
three-lens projection system that also had the RGB filters on each of
the lenses - thus creating a colour projection.

The US Library of congress (amongst others) has recreated these colour
"prints" as well as explaining the original process and the process
they used to recreate them
<http://www.loc.gov/exhibits/empire/making.html>.

Nearly as much fun as sticking a pinhole "lens" on a CCD!

--
Eric Hocking

"Eric Hocking" <(E-Mail Removed)> wrote

> Each of the lenses had a different coloured
> filter, red, green, blue.

> <http://www.loc.gov/exhibits/empire/making.html>.

A black and white CCD (they are colour-blind afterall) with color filters
over each photosite to produce a color photo through interpolation. We've
come a long way haven't we :-).

Thanks for the link, an interesting read.

KC

"Eric Hocking" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> Just recently we've had a couple of discussions on creating B&W prints
> or slides from colour stock, but I just came across this interesting
> process from the turn of the century, whereby a Russian photographer
> was able to project B&W glass plate photographs in true colour
>
> It was done by shooting with a custom camera that had three lenses
> mounted one above the other, which created three frames of the same
> scene on a glass plate. Each of the lenses had a different coloured
> filter, red, green, blue. The glass plate was then displayed using a
> three-lens projection system that also had the RGB filters on each of
> the lenses - thus creating a colour projection.

I think that's pretty much how that thing rumbling around on Mars takes its
colour pictures.

Russ.

"Russ" <russell_UnSpamMe_@thehovel.net> wrote in message
news:buoeh0$f9tb9$(E-Mail Removed)...
> "Eric Hocking" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) om...
> > Just recently we've had a couple of discussions on creating B&W prints
> > or slides from colour stock, but I just came across this interesting
> > process from the turn of the century, whereby a Russian photographer
> > was able to project B&W glass plate photographs in true colour
> >
> > It was done by shooting with a custom camera that had three lenses
> > mounted one above the other, which created three frames of the same
> > scene on a glass plate. Each of the lenses had a different coloured
> > filter, red, green, blue. The glass plate was then displayed using a
> > three-lens projection system that also had the RGB filters on each of
> > the lenses - thus creating a colour projection.
>
> I think that's pretty much how that thing rumbling around on Mars takes
its
> colour pictures.

As Ken said "W've come a long way, haven't we?" <g>

--
Eric Hocking
www.twofromoz.freeserve.co.uk
"A closed mouth gathers no feet"
"Ignorance is a renewable resource" P.J.O'Rourke
Attempting spam blocking - remove upper case to reply.

"Ken Chandler" <news(at)kenchandler_com> wrote in message
news:400e819d$0$16589$(E-Mail Removed) u...
> "Eric Hocking" <(E-Mail Removed)> wrote
>
> > Each of the lenses had a different coloured
> > filter, red, green, blue.
>
> > <http://www.loc.gov/exhibits/empire/making.html>.
>
> A black and white CCD (they are colour-blind afterall) with color filters
> over each photosite to produce a color photo through interpolation. We've
> come a long way haven't we :-).

All this modern stuff is just gilding the lily if you think about it that
way.

> Thanks for the link, an interesting read.


--
Eric Hocking
www.twofromoz.freeserve.co.uk
"A closed mouth gathers no feet"
"Ignorance is a renewable resource" P.J.O'Rourke
Attempting spam blocking - remove upper case to reply.