<s>
The	O
Stereo	B-Algorithm
Realist	I-Algorithm
is	O
a	O
stereo	B-Algorithm
camera	I-Algorithm
that	O
was	O
manufactured	O
by	O
the	O
David	O
White	O
Company	O
from	O
1947	O
to	O
1971	O
.	O
</s>
<s>
It	O
was	O
the	O
most	O
popular	O
35mm	O
stereo	B-Algorithm
camera	I-Algorithm
ever	O
manufactured	O
and	O
started	O
the	O
era	O
of	O
popular	O
stereo	B-Algorithm
photography	I-Algorithm
of	O
the	O
mid	O
20th	O
century	O
.	O
</s>
<s>
Seton	O
Rochwite	O
was	O
a	O
camera	O
hobbyist	O
who	O
began	O
designing	O
and	O
building	O
his	O
own	O
stereo	B-Algorithm
cameras	I-Algorithm
in	O
1929	O
.	O
</s>
<s>
The	O
company	O
began	O
advertising	O
the	O
"	O
Stereo	B-Algorithm
Realist	I-Algorithm
"	O
in	O
photography	O
magazines	O
in	O
1945	O
,	O
although	O
it	O
was	O
not	O
produced	O
until	O
late	O
1947	O
.	O
</s>
<s>
The	O
David	O
White	O
Company	O
had	O
great	O
success	O
marketing	O
the	O
Stereo	B-Algorithm
Realist	I-Algorithm
system	O
to	O
the	O
public	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
stereo	B-Algorithm
cameras	I-Algorithm
there	O
were	O
special	O
slide	B-Algorithm
viewers	I-Algorithm
,	O
projectors	O
,	O
film	O
cutters	O
,	O
slide	O
mounting	O
aids	O
,	O
cases	O
,	O
and	O
other	O
accessories	O
available	O
.	O
</s>
<s>
The	O
Stereo	B-Algorithm
Realist	I-Algorithm
system	O
proved	O
so	O
popular	O
that	O
Revere	O
,	O
Bell	O
and	O
Howell	O
,	O
Three	O
Dimension	O
Company	O
(	O
TDC	O
)	O
and	O
Kodak	O
marketed	O
their	O
own	O
cameras	O
using	O
the	O
same	O
format	O
.	O
</s>
<s>
The	O
Kodak	B-Algorithm
Stereo	I-Algorithm
Camera	I-Algorithm
in	O
particular	O
,	O
which	O
was	O
both	O
less	O
expensive	O
and	O
easier	O
to	O
use	O
,	O
might	O
have	O
outsold	O
the	O
Realist	O
,	O
had	O
it	O
been	O
released	O
prior	O
to	O
the	O
end	O
of	O
1954	O
.	O
</s>
<s>
By	O
the	O
mid-1950s	O
,	O
the	O
public	O
's	O
fascination	O
with	O
stereo	O
imaging	O
was	O
fading	O
,	O
and	O
by	O
1960	O
the	O
Stereo	B-Algorithm
Realist	I-Algorithm
was	O
the	O
only	O
stereo	B-Algorithm
camera	I-Algorithm
of	O
the	O
1950s	O
era	O
that	O
was	O
still	O
manufactured	O
.	O
</s>
<s>
It	O
marked	O
a	O
significant	O
milestone	O
in	O
stereoscopy	B-Algorithm
.	O
</s>
<s>
The	O
standard	O
Realist	O
and	O
Kodak	B-Algorithm
Stereo	I-Algorithm
Camera	I-Algorithm
have	O
the	O
cartridge	O
on	O
the	O
left	O
side	O
,	O
so	O
the	O
images	O
have	O
the	O
same	O
orientation	O
as	O
the	O
numbers	O
.	O
</s>
<s>
The	O
routine	O
for	O
taking	O
a	O
photograph	O
with	O
a	O
Stereo	B-Algorithm
Realist	I-Algorithm
is	O
elaborate	O
,	O
compared	O
to	O
a	O
modern	O
camera	O
.	O
</s>
<s>
One	O
must	O
lift	O
the	O
lens	O
cover	O
,	O
focus	O
,	O
manually	O
set	O
the	O
aperture	B-General_Concept
and	O
shutter	O
speed	O
,	O
cock	O
the	O
shutter	O
and	O
then	O
take	O
the	O
picture	O
.	O
</s>
<s>
This	O
was	O
called	O
"	O
The	O
Three	O
R	O
's	O
in	O
Outdoor	O
Stereo	B-Algorithm
Photography	I-Algorithm
"	O
and	O
is	O
based	O
on	O
the	O
then-standard	O
ASA	O
10	O
color	O
slide	O
film	O
.	O
</s>
<s>
A	O
characteristic	O
of	O
"	O
Stereo	B-Algorithm
Realist	I-Algorithm
"	O
type	O
cameras	O
is	O
that	O
the	O
lenses	O
are	O
at	O
a	O
fixed	O
separation	O
,	O
known	O
as	O
"	O
fixed	O
stereo	O
base	O
"	O
,	O
which	O
was	O
slightly	O
more	O
than	O
the	O
average	O
distance	O
between	O
the	O
human	O
eyes	O
.	O
</s>
<s>
Viewing	O
accessories	O
included	O
several	O
types	O
of	O
slide	B-Algorithm
viewers	I-Algorithm
,	O
the	O
Realist	O
stereo	O
projector	O
,	O
</s>
<s>
The	O
f/3.5	O
lenses	O
all	O
show	O
vignetting	O
at	O
smaller	O
apertures	B-General_Concept
whereas	O
the	O
f/2.8	O
lenses	O
do	O
not	O
.	O
</s>
<s>
It	O
was	O
marketed	O
by	O
Realist	O
Inc	O
.	O
in	O
the	O
U.S.	O
,	O
apparently	O
as	O
an	O
economical	O
,	O
easy-to-use	O
camera	O
to	O
compete	O
with	O
the	O
Kodak	B-Algorithm
Stereo	I-Algorithm
Camera	I-Algorithm
.	O
</s>
<s>
Though	O
the	O
design	O
is	O
clearly	O
different	O
,	O
the	O
Realist	O
45	O
has	O
several	O
features	O
in	O
common	O
with	O
the	O
Kodak	B-Algorithm
Stereo	I-Algorithm
Camera	I-Algorithm
.	O
</s>
<s>
The	O
Realist	O
45	O
also	O
differs	O
from	O
the	O
Kodak	B-Algorithm
Stereo	I-Algorithm
Camera	I-Algorithm
in	O
several	O
ways	O
:	O
the	O
Realist	O
45	O
film	O
transport	O
features	O
a	O
swing-out	O
lever	O
that	O
allows	O
rapid	O
winding	O
,	O
a	O
handy	O
feature	O
for	O
those	O
wishing	O
to	O
take	O
a	O
lot	O
of	O
shots	O
quickly	O
.	O
</s>
<s>
Aperture	B-General_Concept
settings	O
are	O
on	O
a	O
ring	O
mounted	O
on	O
the	O
left	O
lens	O
,	O
ranging	O
from	O
f/3.5	O
to	O
f/16	O
with	O
all	O
whole	O
f-stops	O
marked	O
.	O
</s>
<s>
The	O
Realist	O
45	O
also	O
features	O
the	O
then-standard	O
hot	B-Algorithm
shoe	I-Algorithm
(	O
referred	O
to	O
as	O
an	O
accessory	O
clip	O
)	O
.	O
</s>
<s>
The	O
Olden	O
Realist	O
cameras	O
sold	O
from	O
1970	O
to	O
around	O
1976	O
were	O
some	O
of	O
the	O
last	O
new	O
Stereo	B-Algorithm
Realists	I-Algorithm
sold	O
.	O
</s>
<s>
model	O
1060	O
had	O
the	O
same	O
body	O
as	O
the	O
regular	O
Stereo	B-Algorithm
Realist	I-Algorithm
but	O
was	O
a	O
completely	O
different	O
camera	O
.	O
</s>
<s>
Unlike	O
the	O
regular	O
Realist	O
,	O
it	O
had	O
fixed	O
focus	O
and	O
fixed	O
aperture	B-General_Concept
.	O
</s>
<s>
After	O
the	O
David	O
White	O
Company	O
got	O
out	O
of	O
the	O
stereo	B-Algorithm
photography	I-Algorithm
business	O
,	O
a	O
company	O
called	O
Sigma	O
continued	O
to	O
make	O
Realist-style	O
aluminum	O
masks	O
without	O
Realist	O
branding	O
until	O
the	O
supply	O
of	O
semi-rigid	O
aluminum	O
dried	O
up	O
.	O
</s>
<s>
Supplies	O
are	O
generally	O
available	O
from	O
stereo	B-Algorithm
photography	I-Algorithm
clubs	O
,	O
eBay	O
or	O
mail	O
order	O
companies	O
.	O
</s>
<s>
The	O
Stereo	B-Algorithm
Realist	I-Algorithm
was	O
designed	O
to	O
use	O
slide	O
film	O
.	O
</s>
<s>
Users	O
who	O
do	O
not	O
do	O
their	O
own	O
film	O
processing	O
but	O
which	O
have	O
their	O
own	O
35mm	O
film	O
scanner	O
and	O
a	O
computer	O
with	O
photo	O
editing	O
software	O
such	O
as	O
Photoshop	B-Operating_System
or	O
GIMP	B-Application
can	O
have	O
their	O
negatives	O
returned	O
uncut	O
(	O
lab	O
dependent	O
)	O
and	O
can	O
prepare	O
the	O
images	O
for	O
printing	O
on	O
standard	O
size	O
photo	O
paper	O
themselves	O
.	O
</s>
<s>
Stereo	O
slides	O
viewed	O
in	O
hand-held	O
slide	B-Algorithm
viewers	I-Algorithm
reveal	O
a	O
lot	O
of	O
detail	O
,	O
making	O
grain	O
more	O
noticeable	O
.	O
</s>
<s>
Digital	O
photography	O
is	O
changing	O
the	O
stereo	B-Algorithm
photography	I-Algorithm
market	O
.	O
</s>
<s>
With	O
the	O
recent	O
popularity	O
of	O
3D	O
movies	O
,	O
3D	O
televisions	O
and	O
3D	O
computer	O
gaming	O
,	O
there	O
has	O
been	O
a	O
renewed	O
interest	O
in	O
stereo	B-Algorithm
photography	I-Algorithm
.	O
</s>
<s>
Consumer	O
stereo	O
digital	O
cameras	O
are	O
starting	O
to	O
appear	O
on	O
the	O
market	O
(	O
such	O
as	O
the	O
Fujifilm	B-Algorithm
FinePix	I-Algorithm
Real	I-Algorithm
3D	I-Algorithm
W1	I-Algorithm
and	O
its	O
successor	O
,	O
the	O
W3	O
)	O
,	O
but	O
have	O
yet	O
to	O
become	O
as	O
well	O
known	O
as	O
the	O
Stereo	B-Algorithm
Realist	I-Algorithm
in	O
its	O
day	O
,	O
though	O
the	O
Fuji	O
W3	O
has	O
already	O
outsold	O
the	O
Stereo	B-Algorithm
Realist	I-Algorithm
,	O
and	O
is	O
expected	O
to	O
outsell	O
all	O
the	O
1950s	O
stereo	B-Algorithm
cameras	I-Algorithm
combined	O
by	O
September	O
2011	O
.	O
</s>
<s>
There	O
are	O
still	O
dedicated	O
Stereo	B-Algorithm
Realist	I-Algorithm
camera	O
users	O
,	O
and	O
active	O
stereo	B-Algorithm
photography	I-Algorithm
clubs	O
around	O
the	O
world	O
.	O
</s>
<s>
The	O
"	O
Stereo	B-Algorithm
Realist	I-Algorithm
"	O
trademark	O
is	O
currently	O
registered	O
to	O
John	O
J	O
.	O
Zelenka	O
and	O
is	O
currently	O
in	O
use	O
as	O
a	O
3D	O
production	O
and	O
services	O
company	O
located	O
in	O
New	O
York	O
.	O
</s>
<s>
Leo	O
Villa	O
,	O
mechanic	O
for	O
Sir	O
Malcolm	O
and	O
Donald	O
Campbell	O
's	O
record-breaking	O
Bluebirds	O
,	O
was	O
given	O
a	O
Stereo	B-Algorithm
Realist	I-Algorithm
by	O
Campbell	O
in	O
1955	O
.	O
</s>
<s>
Many	O
of	O
his	O
photographs	O
with	O
it	O
have	O
recently	O
been	O
published	O
in	O
book	O
form	O
as	O
polychromatic	O
anaglyphs	B-Algorithm
(	O
i.e.	O
,	O
single	O
composite	O
photographs	O
viewed	O
through	O
colored	O
viewing	O
glasses	O
)	O
.	O
</s>
<s>
Harold	O
Lloyd	O
took	O
thousands	O
of	O
stereo	O
slides	O
with	O
his	O
Realist	O
and	O
wrote	O
the	O
introduction	O
to	O
the	O
Stereo	B-Algorithm
Realist	I-Algorithm
Manual	O
published	O
by	O
Morgan	O
and	O
Lester	O
.	O
</s>
