<s>
The	O
SX-70	B-Algorithm
is	O
a	O
folding	O
single	B-Algorithm
lens	I-Algorithm
reflex	I-Algorithm
Land	B-Algorithm
camera	I-Algorithm
which	O
was	O
produced	O
by	O
the	O
Polaroid	O
Corporation	O
from	O
1972	O
to	O
1981	O
.	O
</s>
<s>
The	O
Land	B-Algorithm
Camera	I-Algorithm
Model	O
95	O
was	O
the	O
first	O
camera	O
to	O
use	O
instant	O
film	O
to	O
quickly	O
produce	O
photographs	O
without	O
developing	O
them	O
in	O
a	O
laboratory	O
.	O
</s>
<s>
The	O
popular	O
Model	O
95	O
and	O
subsequent	O
Land	B-Algorithm
Cameras	I-Algorithm
required	O
complex	O
procedures	O
to	O
take	O
and	O
produce	O
good	O
photographs	O
.	O
</s>
<s>
The	O
instructions	O
for	O
the	O
Model	B-Algorithm
20	I-Algorithm
Swinger	I-Algorithm
,	O
introduced	O
in	O
1965	O
,	O
warned	O
that	O
,	O
if	O
not	O
followed	O
,	O
"	O
you	O
’re	O
headed	O
for	O
plenty	O
of	O
picture	O
taking	O
trouble	O
"	O
.	O
</s>
<s>
Pictures	O
from	O
the	O
SX-70	B-Algorithm
,	O
by	O
contrast	O
,	O
ejected	O
automatically	O
and	O
developed	O
quickly	O
(	O
fully	O
within	O
10	O
minutes	O
)	O
without	O
chemical	O
residue	O
.	O
</s>
<s>
Polaroid	O
founder	O
Edwin	O
H	O
.	O
Land	O
announced	O
the	O
SX-70	B-Algorithm
at	O
a	O
company	O
annual	O
meeting	O
in	O
April	O
1972	O
.	O
</s>
<s>
On	O
stage	O
,	O
he	O
took	O
out	O
a	O
folded	O
SX-70	B-Algorithm
from	O
his	O
suit	O
coat	O
pocket	O
and	O
in	O
ten	O
seconds	O
took	O
five	O
pictures	O
,	O
both	O
actions	O
impossible	O
with	O
previous	O
Land	B-Algorithm
Cameras	I-Algorithm
.	O
</s>
<s>
The	O
company	O
first	O
sold	O
the	O
SX-70	B-Algorithm
in	O
Miami	O
,	O
Florida	O
in	O
late	O
1972	O
,	O
and	O
began	O
selling	O
it	O
nationally	O
in	O
fall	O
1973	O
.	O
</s>
<s>
In	O
19734	O
,	O
the	O
Skylab	O
3	O
and	O
4	O
astronauts	O
used	O
an	O
SX-70	B-Algorithm
to	O
photograph	O
a	O
video	O
display	O
screen	O
to	O
be	O
able	O
to	O
compare	O
the	O
Sun	O
's	O
features	O
from	O
one	O
orbit	O
to	O
the	O
next	O
.	O
</s>
<s>
There	O
were	O
a	O
variety	O
of	O
models	O
beginning	O
in	O
1972	O
with	O
the	O
original	O
SX-70	B-Algorithm
,	O
though	O
all	O
shared	O
the	O
same	O
basic	O
design	O
.	O
</s>
<s>
The	O
later	O
Sonar	O
OneStep	O
(	O
introduced	O
in	O
1978	O
)	O
and	O
SLR	B-Algorithm
680	O
models	O
were	O
equipped	O
with	O
a	O
sonar	O
autofocus	O
system	O
.	O
</s>
<s>
The	O
Sonar	O
OneStep	O
models	O
were	O
the	O
first	O
autofocus	O
SLRs	B-Algorithm
available	O
to	O
consumers	O
.	O
</s>
<s>
The	O
later	O
SLR	B-Algorithm
680/690	O
models	O
updated	O
the	O
basic	O
design	O
of	O
the	O
Sonar	O
OneStep	O
to	O
more	O
modern	O
standards	O
by	O
incorporating	O
support	O
for	O
newer	O
600	O
film	O
cartridges	O
instead	O
of	O
SX-70	B-Algorithm
cartridges	O
,	O
and	O
a	O
built-in	O
flash	O
instead	O
of	O
the	O
disposable	O
"	O
Flash	O
Bar	O
"	O
.	O
</s>
<s>
Today	O
they	O
are	O
the	O
most	O
evolved	O
forms	O
of	O
the	O
SX-70	B-Algorithm
,	O
and	O
are	O
highly	O
sought	O
after	O
by	O
Polaroid	O
enthusiasts	O
.	O
</s>
<s>
Though	O
expensive	O
,	O
the	O
SX-70	B-Algorithm
was	O
popular	O
in	O
the	O
1970s	O
and	O
retains	O
a	O
cult	O
following	O
today	O
.	O
</s>
<s>
Photographers	O
such	O
as	O
Ansel	O
Adams	O
,	O
Andy	O
Warhol	O
,	O
Helmut	O
Newton	O
,	O
and	O
Walker	O
Evans	O
praised	O
and	O
used	O
the	O
SX-70	B-Algorithm
.	O
</s>
<s>
Not	O
until	O
the	O
$40	O
Model	B-Algorithm
1000	I-Algorithm
OneStep	I-Algorithm
using	O
SX-70	B-Algorithm
film	O
became	O
the	O
best-selling	O
camera	O
of	O
the	O
1977	O
Christmas	O
shopping	O
season	O
,	O
however	O
,	O
did	O
its	O
technology	O
become	O
truly	O
popular	O
.	O
</s>
<s>
More	O
recently	O
,	O
it	O
was	O
the	O
inspiration	O
for	O
the	O
Belfast	O
alternative	O
band	O
SX-70	B-Algorithm
'	O
s	O
name	O
.	O
</s>
<s>
The	O
SX-70	B-Algorithm
included	O
many	O
sophisticated	O
design	O
elements	O
.	O
</s>
<s>
A	O
collapsible	O
SLR	B-Algorithm
required	O
a	O
complex	O
light	O
path	O
for	O
the	O
viewfinder	O
,	O
with	O
three	O
mirrors	O
(	O
including	O
one	O
Fresnel	O
reflector	O
)	O
of	O
unusual	O
,	O
aspheric	O
shapes	O
set	O
at	O
odd	O
angles	O
to	O
create	O
an	O
erect	O
image	O
on	O
the	O
film	O
and	O
an	O
erect	O
aerial	O
image	O
for	O
the	O
viewfinder	O
.	O
</s>
<s>
All	O
SX-70	B-Algorithm
models	O
feature	O
a	O
folding	O
body	O
design	O
,	O
a	O
4-element	O
116mm	O
f/8	O
glass	O
lens	O
,	O
and	O
an	O
automatic	O
exposure	O
system	O
known	O
as	O
the	O
Electric	O
Eye	O
.	O
</s>
<s>
The	O
Model	O
3	O
departs	O
from	O
the	O
other	O
models	O
since	O
it	O
is	O
n't	O
a	O
SLR	B-Algorithm
,	O
but	O
instead	O
has	O
the	O
viewfinder	O
cut	O
into	O
the	O
mirror	O
hood	O
.	O
</s>
<s>
A	O
whole	O
array	O
of	O
accessories	O
could	O
be	O
utilized	O
with	O
SX-70	B-Algorithm
cameras	O
,	O
such	O
as	O
a	O
close-up	O
lens	O
(	O
1:1	O
@	O
5inches	O
)	O
,	O
electrical	O
remote	O
shutter	O
release	O
,	O
tripod	O
mount	O
and	O
an	O
Ever-Ready	O
carrying	O
case	O
that	O
hung	O
from	O
the	O
neck	O
and	O
unfolded	O
in	O
concert	O
with	O
the	O
camera	O
.	O
</s>
<s>
A	O
lot	O
of	O
the	O
technology	O
used	O
in	O
the	O
folding	O
SX-70	B-Algorithm
cameras	O
was	O
later	O
used	O
in	O
the	O
production	O
of	O
rigid	O
"	O
box	O
"	O
type	O
SX-70	B-Algorithm
cameras	O
,	O
such	O
as	O
the	O
Model	B-Algorithm
1000	I-Algorithm
OneStep	I-Algorithm
,	O
Pronto	O
,	O
Presto	O
and	O
The	O
Button	O
.	O
</s>
<s>
These	O
models	O
,	O
although	O
also	O
utilizing	O
SX-70	B-Algorithm
film	O
,	O
are	O
very	O
different	O
from	O
the	O
folding	O
SLR	B-Algorithm
SX-70s	B-Algorithm
.	O
</s>
<s>
MiNT	O
Camera	O
modified	O
SX-70	B-Algorithm
'	O
s	O
into	O
their	O
SLR670	O
's	O
(	O
it	O
uses	O
600	O
film	O
natively	O
without	O
needing	O
to	O
add	O
a	O
neutral-density	O
filter	O
)	O
.	O
</s>
<s>
MiNT	O
also	O
produces	O
flash	O
bars	O
and	O
filter	O
lenses	O
intended	O
for	O
the	O
SX-70	B-Algorithm
.	O
</s>
<s>
OpenSX70	O
is	O
a	O
project	O
to	O
replace	O
the	O
printed	O
circuit	O
board	O
(	O
PCB	O
)	O
on	O
the	O
SX-70	B-Algorithm
with	O
a	O
modern	O
open-source	O
design	O
based	O
on	O
Arduino	O
.	O
</s>
<s>
The	O
new	O
PCB	O
also	O
features	O
an	O
LED	O
indicator	O
and	O
an	O
audio	B-Device
jack	I-Device
for	O
firing	O
an	O
external	O
flash	O
.	O
</s>
<s>
Polaroid	B-Algorithm
SX-70	I-Algorithm
film	O
has	O
a	O
79	O
x	O
79mm	O
(	O
3.108	O
x	O
3.024	O
in²	O
)	O
square	O
image	O
area	O
and	O
a	O
108	O
x	O
88mm²	O
(	O
4.233	O
x	O
3.483	O
in²	O
)	O
total	O
area	O
.	O
</s>
<s>
The	O
original	O
SX-70	B-Algorithm
film	O
was	O
improved	O
once	O
in	O
the	O
mid-1970s	O
(	O
New	O
Improved	O
Faster	O
Developing	O
!	O
)	O
</s>
<s>
and	O
replaced	O
in	O
1980	O
by	O
the	O
further	O
advanced	O
"	O
SX-70	B-Algorithm
Time-Zero	O
Supercolor	O
"	O
product	O
,	O
in	O
which	O
the	O
layers	O
in	O
the	O
film	O
card	O
were	O
altered	O
to	O
allow	O
a	O
much	O
faster	O
development	O
time	O
(	O
hence	O
the	O
"	O
time	O
zero	O
"	O
)	O
.	O
</s>
<s>
There	O
were	O
also	O
professional	O
market	O
varieties	O
of	O
the	O
SX-70	B-Algorithm
film	O
including	O
778	O
(	O
Time	O
Zero	O
equivalent	O
)	O
and	O
the	O
similar	O
708	O
,	O
Time	O
Zero	O
film	O
without	O
a	O
battery	O
,	O
intended	O
for	O
use	O
in	O
applications	O
such	O
as	O
the	O
"	O
Face	O
Place	O
"	O
photo	O
booth	O
and	O
professional	O
or	O
laboratory	O
film-backs	O
,	O
where	O
a	O
battery	O
is	O
not	O
needed	O
.	O
</s>
<s>
Time	O
Zero	O
was	O
the	O
film	O
manufactured	O
up	O
until	O
2005	O
,	O
though	O
overseas-market	O
and	O
some	O
last	O
run	O
film	O
packs	O
were	O
marked	O
only	O
as	O
SX-70	B-Algorithm
.	O
</s>
<s>
A	O
feature	O
of	O
the	O
SX-70	B-Algorithm
film	O
packs	O
was	O
a	O
built-in	O
battery	O
to	O
power	O
the	O
camera	O
motors	O
and	O
exposure	O
control	O
,	O
ensuring	O
that	O
a	O
charged	O
battery	O
would	O
always	O
be	O
available	O
as	O
long	O
as	O
film	O
was	O
in	O
the	O
camera	O
.	O
</s>
<s>
Polaroid	O
later	O
released	O
development	O
kits	O
to	O
allow	O
the	O
Polapulse	B-Algorithm
battery	I-Algorithm
to	O
be	O
used	O
in	O
non-photographic	O
applications	O
.	O
</s>
<s>
The	O
Polaroid	O
600	O
series	O
film	O
,	O
introduced	O
in	O
1981	O
,	O
has	O
the	O
same	O
film	O
format	O
and	O
cartridge	O
as	O
that	O
of	O
the	O
SX-70	B-Algorithm
but	O
features	O
a	O
higher	O
film	O
speed	O
at	O
ISO	O
640	O
.	O
</s>
<s>
The	O
2-stop	O
difference	O
in	O
sensitivity	O
can	O
be	O
compensated	O
in	O
an	O
SX-70	B-Algorithm
by	O
using	O
a	O
ND-filter	O
or	O
through	O
circuit	O
modifications	O
that	O
change	O
the	O
exposure	O
time	O
.	O
</s>
<s>
MiNT	O
Camera	O
produces	O
modified	O
SX-70s	B-Algorithm
that	O
can	O
take	O
the	O
higher-sensitivity	O
film	O
.	O
</s>
<s>
Polaroid	B-Algorithm
SX-70	I-Algorithm
"	O
Time-Zero	O
"	O
film	O
was	O
phased	O
out	O
of	O
production	O
in	O
late	O
2005	O
to	O
early	O
2006	O
(	O
differing	O
according	O
to	O
regional	O
markets	O
)	O
.	O
</s>
<s>
In	O
2017	O
,	O
the	O
Impossible	O
Project	O
rebranded	O
as	O
Polaroid	O
Originals	O
,	O
joined	O
the	O
Polaroid	O
Corporation	O
and	O
began	O
selling	O
SX-70	B-Algorithm
through	O
Polaroid	O
.	O
</s>
<s>
Polaroid	O
produces	O
lines	O
of	O
black	O
and	O
white	O
and	O
color	O
film	O
compatible	O
with	O
the	O
SX-70	B-Algorithm
,	O
though	O
their	O
films	O
use	O
a	O
different	O
chemistry	O
than	O
original	O
Polaroid	O
film	O
and	O
have	O
different	O
characteristics	O
such	O
as	O
lower	O
color	O
quality	O
,	O
longer	O
development	O
times	O
,	O
and	O
higher	O
sensitivity	O
to	O
outside	O
forces	O
including	O
light	O
and	O
pressure	O
.	O
</s>
<s>
One	O
feature	O
of	O
SX-70	B-Algorithm
integral	O
print	O
film	O
is	O
its	O
ability	O
to	O
be	O
manipulated	O
while	O
developing	O
,	O
and	O
for	O
some	O
days	O
after	O
.	O
</s>
