<s>
The	O
Pentax	B-Application
6×7	O
(	O
called	O
"	O
Pentax67	O
"	O
after	O
1990	O
)	O
is	O
a	O
SLR	B-Algorithm
medium	O
format	O
system	O
film	O
camera	O
for	O
120	O
and	O
220film	O
,	O
which	O
produces	O
images	O
on	O
the	O
film	O
that	O
are	O
nominally	O
6cm	O
by	O
7cm	O
in	O
size	O
(	O
actual	O
image	O
on	O
the	O
film	O
is	O
56mm	O
×	O
70mm	O
)	O
,	O
made	O
by	O
Pentax	B-Application
.	O
</s>
<s>
Since	O
then	O
,	O
with	O
improvements	O
,	O
it	O
was	O
released	O
in	O
1969	O
as	O
the	O
Asahi	B-Algorithm
Pentax	I-Algorithm
6×7	O
,	O
as	O
well	O
as	O
the	O
Honeywell	O
Pentax	B-Application
6×7	O
for	O
the	O
North	O
American	O
import	O
market	O
.	O
</s>
<s>
In	O
1990	O
,	O
it	O
received	O
a	O
number	O
of	O
minor	O
engineering	O
updates	O
and	O
cosmetic	O
changes	O
and	O
was	O
renamed	O
as	O
the	O
Pentax	B-Application
67	O
.	O
</s>
<s>
The	O
camera	O
resembles	O
a	O
conventional	O
35mm	O
SLR	B-Algorithm
camera	I-Algorithm
,	O
with	O
interchangeable	O
viewfinder	O
and	O
lens	O
,	O
but	O
is	O
considerably	O
bigger	O
and	O
heavier	O
,	O
weighing	O
with	O
the	O
plain	O
prism	O
and	O
standard	O
(	O
105mm	O
)	O
lens	O
.	O
</s>
<s>
It	O
is	O
perhaps	O
inspired	O
by	O
the	O
1957	O
East	O
German	O
6×6	O
KW	O
Praktisix	B-Algorithm
and	O
its	O
successor	O
,	O
the	O
Pentacon	B-Algorithm
Six	I-Algorithm
,	O
although	O
the	O
horizontal	O
SLR	B-Algorithm
concept	O
can	O
be	O
traced	O
back	O
to	O
the	O
1933	O
Ihagee	O
VP	O
Exakta	O
.	O
</s>
<s>
More	O
than	O
forty	O
years	O
after	O
the	O
original	O
camera	O
introduction	O
a	O
wide	O
selection	O
of	O
lenses	O
is	O
still	O
available	O
,	O
together	O
with	O
the	O
latest	O
Pentax	B-Algorithm
67	I-Algorithm
II	O
variant	O
.	O
</s>
<s>
The	O
Pentax	B-Application
6×7	O
,	O
designated	O
product	O
model	O
number	O
400	O
by	O
Asahi	B-Algorithm
Pentax	I-Algorithm
,	O
is	O
similar	O
to	O
any	O
traditional	O
35mm	O
SLR	B-Algorithm
camera	I-Algorithm
except	O
in	O
size	O
.	O
</s>
<s>
The	O
Pentax6×7	O
is	O
an	O
electromechanical	O
design	O
and	O
shares	O
much	O
in	O
concept	O
with	O
its	O
smaller	O
135	O
format	O
cousin	O
the	O
"	O
Pentax	B-Application
Electro	O
Spotmatic	O
"	O
,	O
however	O
,	O
is	O
not	O
equipped	O
with	O
an	O
internal	O
meter	O
.	O
</s>
<s>
The	O
most	O
obvious	O
difference	O
with	O
common	O
SLRs	B-Algorithm
is	O
the	O
location	O
of	O
the	O
shutter	O
speed	O
knob	O
being	O
at	O
the	O
left	O
hand	O
top	O
.	O
</s>
<s>
The	O
improved	O
parts	O
would	O
become	O
standard	O
replacements	O
after	O
the	O
early	O
1974	O
for	O
bodies	O
coming	O
in	O
for	O
servicing	O
of	O
the	O
transport	O
mechanism	O
and	O
would	O
later	O
be	O
summarized	O
and	O
identified	O
by	O
the	O
issuing	O
of	O
the	O
parts	O
catalogs	O
in	O
late	O
1974	O
and	O
1975	O
in	O
the	O
fall	O
of	O
1986	O
for	O
the	O
Pentax	B-Application
6×7	O
service	O
bulletin	O
as	O
well	O
as	O
standard	O
parts	O
in	O
the	O
introduced	O
67	O
version	O
launched	O
in	O
1990	O
.	O
</s>
<s>
Pentax	B-Application
slowly	O
phased	O
out	O
the	O
parts	O
compatible	O
with	O
the	O
first	O
released	O
version	O
,	O
in	O
favor	O
of	O
improved	O
and	O
more	O
durable	O
parts	O
.	O
</s>
<s>
The	O
camera	O
could	O
also	O
be	O
returned	O
to	O
a	O
Pentax	B-Application
service	O
facility	O
to	O
have	O
the	O
multiple	O
exposure	O
facility	O
installed	O
at	O
owner	O
's	O
expense	O
.	O
</s>
<s>
Pentax	B-Application
has	O
one	O
of	O
the	O
widest	O
range	O
of	O
lenses	O
available	O
for	O
a	O
medium	O
format	O
camera	O
.	O
</s>
<s>
|	O
The	O
TTL-meter/aperture	O
coupling	O
chain	O
,	O
positioned	O
in	O
the	O
forward	O
recess	O
of	O
the	O
camera	O
body	O
above	O
the	O
PENTAX	B-Application
plate	O
,	O
can	O
break	O
if	O
correct	O
dismounting	O
and	O
re-mounting	O
of	O
the	O
TTL	O
prism	O
and	O
lens	O
is	O
not	O
followed	O
in	O
specific	O
order	O
:	O
</s>
<s>
The	O
later	O
model	O
would	O
also	O
have	O
the	O
sole	O
"	O
Pentax	B-Application
"	O
badge	O
by	O
1986	O
.	O
</s>
<s>
The	O
Pentax	B-Application
grip	O
is	O
arguably	O
an	O
iconic	O
accessory	O
for	O
the	O
camera	O
.	O
</s>
<s>
Pentax6×7	O
lenses	O
feature	O
the	O
ability	O
to	O
accept	O
both	O
standard	O
threaded	O
filters	O
and	O
also	O
Pentax	B-Application
bayonet	O
filters	O
that	O
are	O
available	O
in	O
standard	O
and	O
SMC	O
versions	O
to	O
fit	O
all	O
diameters	O
found	O
on	O
almost	O
all	O
lenses	O
(	O
except	O
those	O
lenses	O
with	O
a	O
filter	O
fitment	O
greater	O
than	O
100mm	O
)	O
.	O
</s>
