<s>
The	O
Mamiya	B-Algorithm
Press	I-Algorithm
is	O
a	O
line	O
of	O
medium-format	O
rangefinder	B-Algorithm
system	O
press	B-Algorithm
cameras	I-Algorithm
manufactured	O
by	O
Mamiya	O
.	O
</s>
<s>
G-type	O
backs	O
included	O
Mamiya	B-Algorithm
RB	I-Algorithm
rollfilm	O
backs	O
and	O
backs	O
using	O
the	O
Graflok	B-Algorithm
system	I-Algorithm
.	O
</s>
<s>
The	O
original	O
line	O
of	O
Press	B-Algorithm
cameras	I-Algorithm
(	O
1960	O
–	O
66	O
)	O
were	O
equipped	O
with	O
a	O
reverse	O
Galilean	O
viewfinder	O
that	O
had	O
a	O
magnification	O
of	O
0.66	O
×	O
and	O
an	O
effective	O
rangefinder	B-Algorithm
baseline	O
length	O
of	O
.	O
</s>
<s>
The	O
upgraded	O
rangefinder	B-Algorithm
introduced	O
with	O
the	O
Super	O
23	O
(	O
1967	O
)	O
and	O
Universal	O
(	O
1969	O
)	O
models	O
had	O
a	O
magnification	O
of	O
0.72	O
×	O
with	O
a	O
slightly	O
increased	O
effective	O
baseline	O
length	O
of	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
upgraded	O
rangefinder	B-Algorithm
had	O
switchable	O
brightline	O
frames	O
corresponding	O
to	O
the	O
100	O
,	O
150	O
,	O
and	O
250mm	O
lenses	O
,	O
which	O
automatically	O
corrected	O
for	O
parallax	O
.	O
</s>
<s>
The	O
original	O
Mamiya	B-Algorithm
Press	I-Algorithm
was	O
introduced	O
in	O
September	O
1960	O
with	O
the	O
M-type	O
(	O
Mamiya	O
)	O
back	O
attachment	O
system	O
.	O
</s>
<s>
The	O
camera	O
was	O
launched	O
as	O
the	O
Mamiya	B-Algorithm
Press	I-Algorithm
Deluxe	O
for	O
the	O
United	O
States	O
market	O
in	O
1962	O
.	O
</s>
<s>
The	O
Press	O
G	O
,	O
introduced	O
in	O
November	O
1963	O
,	O
is	O
identical	O
to	O
the	O
original	O
except	O
for	O
the	O
G-type	O
(	O
Graflok	O
)	O
back	O
attachment	O
system	O
,	O
which	O
is	O
compatible	O
with	O
the	O
same	O
interface	O
used	O
by	O
Graflex	B-Algorithm
Speed	B-Algorithm
Graphic	I-Algorithm
cameras	O
.	O
</s>
<s>
Externally	O
,	O
the	O
Press	O
G	O
can	O
be	O
distinguished	O
by	O
the	O
color	O
of	O
the	O
leather	O
covering	O
,	O
which	O
is	O
black	O
to	O
match	O
the	O
Graflex	B-Algorithm
accessories	O
.	O
</s>
<s>
Externally	O
,	O
the	O
top	O
cover	O
of	O
the	O
Standard	O
has	O
a	O
satin	O
chrome	O
finish	O
(	O
instead	O
of	O
grey	O
paint	O
)	O
and	O
the	O
body	O
is	O
colored	O
black	O
;	O
the	O
name	O
is	O
printed	O
on	O
the	O
front	O
of	O
the	O
camera	O
near	O
the	O
rangefinder	B-Algorithm
window	O
.	O
</s>
<s>
Whereas	O
the	O
600	O
is	O
a	O
fixed-lens	O
camera	O
,	O
equipped	O
with	O
the	O
Mamiya	O
127mm	O
lens	O
,	O
the	O
600SE	O
is	O
fitted	O
with	O
an	O
interchangeable	O
lens	O
mount	O
similar	O
to	O
the	O
Mamiya	B-Algorithm
Press	I-Algorithm
line	O
;	O
however	O
,	O
only	O
three	O
lenses	O
were	O
made	O
(	O
75mm	O
,	O
127mm	O
,	O
and	O
150mm	O
,	O
sharing	O
their	O
optical	O
design	O
with	O
their	O
Mamiya	B-Algorithm
Press	I-Algorithm
counterparts	O
)	O
that	O
cover	O
the	O
full	O
Polaroid	O
Type	O
100	O
frame	O
size	O
of	O
.	O
</s>
<s>
Both	O
backs	O
and	O
lenses	O
are	O
mutually	O
,	O
deliberately	O
incompatible	O
between	O
the	O
Polaroid	O
600	O
and	O
Mamiya	B-Algorithm
Press	I-Algorithm
systems	O
to	O
preserve	O
their	O
respective	O
markets	O
;	O
however	O
,	O
an	O
adapter	O
was	O
made	O
later	O
that	O
allows	O
the	O
use	O
of	O
M-type	O
rollfilm	O
backs	O
on	O
the	O
Polaroid	O
600	O
.	O
</s>
<s>
+	O
Mamiya-Sekor	O
lenses	O
for	O
Mamiya	B-Algorithm
Press	I-Algorithm
cameras	O
Focal	B-Algorithm
length	I-Algorithm
Aperture	B-General_Concept
Image	O
Construction	O
Angle	O
of	O
view	O
Min	O
.	O
</s>
