<s>
The	O
Pentax	B-Algorithm
K1000	I-Algorithm
(	O
originally	O
marked	O
the	O
Asahi	O
Pentax	B-Algorithm
K1000	I-Algorithm
)	O
is	O
an	O
interchangeable	O
lens	O
,	O
35	O
mm	O
film	O
,	O
single-lens	B-Algorithm
reflex	I-Algorithm
(	O
SLR	B-Algorithm
)	O
camera	O
,	O
manufactured	O
by	O
Asahi	B-Application
Optical	I-Application
Co.	I-Application
,	I-Application
Ltd	I-Application
.	I-Application
from	O
1976	O
to	O
1997	O
,	O
originally	O
in	O
Japan	O
.	O
</s>
<s>
The	O
Pentax	B-Algorithm
K1000	I-Algorithm
eventually	O
sold	O
over	O
three	O
million	O
units	O
.	O
</s>
<s>
The	O
K1000	O
,	O
introduced	O
in	O
1976	O
,	O
is	O
the	O
simplest	O
member	O
of	O
Asahi	O
Optical	O
's	O
Pentax	B-Application
K-series	O
35mm	O
SLRs	B-Algorithm
.	O
</s>
<s>
The	O
other	O
members	O
are	O
the	O
Pentax	B-Application
K2	O
,	O
KM	O
,	O
and	O
KX	O
,	O
introduced	O
in	O
1975	O
,	O
and	O
the	O
K2	O
DMD	O
of	O
1976	O
.	O
</s>
<s>
The	O
body	O
was	O
finished	O
in	O
black	O
leather	O
with	O
chrome	O
trim	O
only	O
,	O
although	O
early	O
production	O
Pentax	B-Algorithm
K1000	I-Algorithm
SE	I-Algorithm
bodies	O
had	O
brown	O
leather	O
with	O
chrome	O
trim	O
.	O
</s>
<s>
The	O
introductory	O
US	O
list	O
price	O
for	O
the	O
K1000	O
body	O
with	O
SMC	O
Pentax	B-Application
55mm	O
f/2	O
lens	O
was	O
$299.50	O
.	O
</s>
<s>
In	O
1983	O
,	O
a	O
K1000	O
with	O
SMC	O
Pentax-M	O
50mm	O
f/2	O
lens	O
listed	O
for	O
$220	O
;	O
in	O
1988	O
,	O
the	O
body	O
was	O
$210	O
,	O
but	O
$290	O
with	O
SMC	O
Pentax-A	O
50mm	O
f/2	O
;	O
in	O
1993	O
,	O
the	O
body	O
was	O
$263	O
.	O
</s>
<s>
Note	O
that	O
SLRs	B-Algorithm
usually	O
sold	O
for	O
30	O
to	O
40	O
percent	O
below	O
list	O
price	O
.	O
</s>
<s>
The	O
K1000	O
is	O
an	O
almost-all	O
metal	O
,	O
mechanically	O
(	O
springs	O
,	O
gears	O
,	O
levers	O
)	O
controlled	O
,	O
manual-focus	O
SLR	B-Algorithm
with	O
manual-exposure	O
control	O
.	O
</s>
<s>
There	O
is	O
a	O
basic	O
hot	B-Algorithm
shoe	I-Algorithm
for	O
an	O
electronic	O
flash	O
unit	O
,	O
and	O
also	O
a	O
PC	O
flash	O
lead	O
socket	O
,	O
of	O
X	O
type	O
synchronisation	O
.	O
</s>
<s>
The	O
Pentax	B-Algorithm
K1000	I-Algorithm
SE	I-Algorithm
substituted	O
a	O
split	O
image	O
rangefinder	O
plus	O
microprism	O
collar	O
focusing	O
screen	O
.	O
</s>
<s>
The	O
K1000	O
has	O
a	O
Pentax	B-Algorithm
K	I-Algorithm
bayonet	I-Algorithm
mount	I-Algorithm
,	O
a	O
type	O
introduced	O
with	O
the	O
K	O
Series	O
.	O
</s>
<s>
Originally	O
it	O
was	O
usually	O
sold	O
with	O
the	O
budget	O
SMC	O
Pentax	B-Application
50mm	O
f/2	O
lens	O
,	O
and	O
it	O
accepts	O
any	O
other	O
manual	O
focus	O
lens	O
with	O
the	O
K	B-Algorithm
mount	I-Algorithm
.	O
</s>
<s>
This	O
includes	O
the	O
SMC	O
Pentax	B-Application
,	O
SMC	O
Pentax-M	O
and	O
SMC	O
Pentax-A	O
types	O
.	O
</s>
<s>
In	O
addition	O
,	O
almost	O
all	O
lenses	O
with	O
the	O
Pentax	B-Application
K-AF	O
and	O
K-AF2	O
autofocus	O
lens	O
mounts	O
(	O
introduced	O
1987	O
and	O
1991	O
,	O
respectively	O
)	O
also	O
work	O
in	O
manual	O
focus	O
mode	O
.	O
</s>
<s>
The	O
exceptions	O
are	O
Pentax	B-Application
's	O
newest	O
SMC-Pentax	O
FA	O
J	O
(	O
1997	O
)	O
and	O
SMC-Pentax	O
DA	O
(	O
2004	O
)	O
types	O
which	O
lack	O
an	O
aperture	O
control	O
ring	O
,	O
and	O
K	B-Algorithm
mount	I-Algorithm
lenses	O
designed	O
for	O
APS-C	O
cameras	O
;	O
these	O
can	O
be	O
mounted	O
but	O
with	O
restricted	O
functionality	O
.	O
</s>
<s>
There	O
are	O
also	O
adaptors	O
to	O
allow	O
older	O
screw	B-Algorithm
mount	I-Algorithm
lenses	O
to	O
be	O
used	O
on	O
K	B-Algorithm
mount	I-Algorithm
cameras	O
(	O
with	O
limitations	O
)	O
.	O
</s>
<s>
In	O
all	O
,	O
there	O
are	O
vast	O
numbers	O
of	O
Pentax	B-Application
and	O
third	O
party	O
lenses	O
that	O
can	O
be	O
used	O
with	O
the	O
K1000	O
and	O
other	O
K	B-Algorithm
mount	I-Algorithm
camera	O
bodies	O
.	O
</s>
<s>
As	O
a	O
budget	O
camera	O
,	O
the	O
K1000	O
has	O
fewer	O
features	O
than	O
other	O
mid-1970s	O
SLRs	B-Algorithm
.	O
</s>
<s>
In	O
1975	O
,	O
Asahi	O
Optical	O
replaced	O
its	O
Spotmatic	O
series	O
of	O
35mm	O
SLR	B-Algorithm
cameras	I-Algorithm
with	O
three	O
cameras	O
of	O
the	O
K-series	O
,	O
the	O
Pentax	B-Application
K2	O
,	O
KM	O
and	O
KX	O
.	O
</s>
<s>
They	O
continued	O
the	O
successful	O
Spotmatics	O
 '	O
general	O
style	O
and	O
handling	O
but	O
with	O
the	O
use	O
of	O
a	O
new	O
bayonet	O
mount	O
,	O
the	O
K	B-Algorithm
Mount	I-Algorithm
,	O
in	O
place	O
of	O
the	O
previous	O
M42	B-Algorithm
screw	I-Algorithm
mount	I-Algorithm
.	O
</s>
<s>
A	O
range	O
of	O
SMC	O
Pentax	B-Algorithm
K	I-Algorithm
mount	I-Algorithm
lenses	O
were	O
introduced	O
at	O
the	O
same	O
time	O
.	O
</s>
<s>
In	O
1976	O
Asahi	O
therefore	O
introduced	O
the	O
first	O
of	O
its	O
small	O
M-Series	O
of	O
35mm	O
SLRs	B-Algorithm
and	O
soon	O
the	O
M-Series	O
had	O
become	O
the	O
Pentax	B-Application
mid-range	O
cameras	O
.	O
</s>
<s>
The	O
K1000	O
was	O
thus	O
a	O
Spotmatic	O
F	O
with	O
a	O
K	B-Algorithm
mount	I-Algorithm
,	O
but	O
with	O
the	O
self-timer	O
,	O
depth	O
of	O
field	O
preview	O
,	O
film	O
reminder	O
dial	O
,	O
and	O
the	O
FP	O
flash	O
socket	O
(	O
by	O
now	O
redundant	O
)	O
removed	O
.	O
</s>
<s>
In	O
creating	O
it	O
,	O
Asahi	O
achieved	O
their	O
aim	O
of	O
making	O
the	O
cheapest	O
big-brand	O
35mm	O
SLR	B-Algorithm
on	O
the	O
market	O
,	O
on	O
its	O
introduction	O
at	O
least	O
.	O
</s>
<s>
It	O
was	O
replaced	O
by	O
the	O
highly	O
computerized	O
Pentax	B-Application
ZX-M	O
(	O
also	O
called	O
MZ-M	O
)	O
in	O
1998	O
.	O
</s>
<s>
The	O
"	O
Asahi	O
"	O
name	O
and	O
"	O
AOCo	O
"	O
logo	O
was	O
removed	O
from	O
the	O
pentaprism	O
cover	O
to	O
de-emphasize	O
the	O
company	O
name	O
in	O
keeping	O
with	O
the	O
rest	O
of	O
the	O
"	O
Pentax	B-Application
"	O
line	O
.	O
</s>
