<s>
The	O
Pentax	B-Application
K-mount	O
,	O
sometimes	O
referred	O
to	O
as	O
the	O
"	O
PK-mount	O
"	O
,	O
is	O
a	O
bayonet	O
lens	B-Algorithm
mount	I-Algorithm
standard	O
for	O
mounting	O
interchangeable	O
photographic	O
lenses	O
to	O
35	O
mm	O
single-lens	B-Algorithm
reflex	I-Algorithm
(	O
SLR	B-Device
)	O
cameras	O
.	O
</s>
<s>
It	O
was	O
created	O
by	O
Pentax	B-Application
in	O
1975	O
,	O
and	O
has	O
since	O
been	O
used	O
by	O
all	O
Pentax	B-Application
35	O
mm	O
and	O
digital	B-Device
SLRs	I-Device
and	O
also	O
the	O
MILC	B-Device
Pentax	B-Algorithm
K-01	I-Algorithm
.	O
</s>
<s>
The	O
Pentax	B-Application
K-mount	O
has	O
undergone	O
a	O
number	O
of	O
evolutions	O
over	O
the	O
years	O
as	O
new	O
functionality	O
has	O
been	O
added	O
.	O
</s>
<s>
Originally	O
designed	O
by	O
Zeiss	O
for	O
an	O
alliance	O
with	O
Pentax	B-Application
,	O
it	O
was	O
intended	O
to	O
be	O
a	O
common	O
lens	B-Algorithm
mount	I-Algorithm
for	O
a	O
proposed	O
series	O
of	O
cameras	O
and	O
lenses	O
.	O
</s>
<s>
However	O
,	O
the	O
plan	O
failed	O
to	O
work	O
out	O
and	O
the	O
two	O
firms	O
parted	O
company	O
amicably	O
,	O
but	O
Pentax	B-Application
retained	O
the	O
lens	B-Algorithm
mount	I-Algorithm
and	O
at	O
least	O
one	O
Zeiss	O
lens	O
design	O
for	O
its	O
own	O
use	O
.	O
</s>
<s>
The	O
only	O
linkage	O
with	O
the	O
camera	O
is	O
mechanical	O
and	O
involves	O
the	O
aperture	B-General_Concept
.	O
</s>
<s>
A	O
slot	O
between	O
two	O
of	O
the	O
bayonet	O
tabs	O
on	O
the	O
lens	O
allows	O
the	O
stop-down	O
coupler	O
from	O
the	O
camera	O
to	O
sense	O
the	O
aperture	B-General_Concept
setting	O
on	O
the	O
lens	O
and	O
adjust	O
the	O
light	O
meter	O
display	O
accordingly	O
.	O
</s>
<s>
Bodies	O
equipped	O
with	O
the	O
original	O
K-mount	O
include	O
the	O
K	O
series	O
,	O
the	O
M	O
series	O
except	O
the	O
ME	O
F	O
,	O
and	O
the	O
LX	B-Algorithm
.	O
</s>
<s>
Lenses	O
that	O
support	O
it	O
include	O
those	O
labelled	O
'	O
SMC	O
Pentax	B-Application
 '	O
,	O
'	O
SMC	O
Pentax-M	O
'	O
and	O
'	O
SMC	O
Pentax-A	O
'	O
.	O
</s>
<s>
These	O
K-mount	O
bodies	O
cannot	O
use	O
lenses	O
that	O
lack	O
an	O
aperture	B-General_Concept
ring	O
,	O
such	O
as	O
FAJ	O
or	O
DA	O
.	O
</s>
<s>
K-mount	O
lenses	O
can	O
be	O
used	O
on	O
all	O
Pentax	B-Application
bodies	O
,	O
but	O
are	O
restricted	O
to	O
stopped	O
down	O
mode	O
when	O
used	O
with	O
"	O
crippled	O
"	O
KAF-mount	O
bodies	O
(	O
see	O
below	O
)	O
.	O
</s>
<s>
The	O
KF-mount	O
was	O
Pentax	B-Application
's	O
first	O
attempt	O
at	O
an	O
autofocus	O
system	O
.	O
</s>
<s>
Only	O
one	O
camera	O
and	O
one	O
lens	O
ever	O
used	O
this	O
mount	O
,	O
the	O
Pentax	B-Algorithm
ME	I-Algorithm
F	I-Algorithm
and	O
SMC	O
Pentax-AF	O
35-70/2.8	O
.	O
</s>
<s>
KF	O
and	O
the	O
ME-F	O
are	O
similar	O
in	O
many	O
ways	O
to	O
the	O
system	O
used	O
by	O
Canon	O
in	O
the	O
ill-fated	O
Canon	B-Algorithm
T80	I-Algorithm
,	O
introduced	O
several	O
years	O
later	O
.	O
</s>
<s>
The	O
ME	O
F	O
can	O
use	O
all	O
Pentax	B-Application
K-mount	O
lenses	O
which	O
feature	O
an	O
aperture	B-General_Concept
ring	O
.	O
</s>
<s>
The	O
35	O
–	O
70mm	O
lens	O
can	O
be	O
used	O
on	O
all	O
other	O
Pentax	B-Application
K-mount	O
bodies	O
in	O
manual	O
focus	O
mode	O
,	O
but	O
it	O
must	O
be	O
used	O
stopped	O
down	O
on	O
"	O
crippled	O
"	O
KAF	O
bodies	O
.	O
</s>
<s>
It	O
allows	O
the	O
lens	O
's	O
aperture	B-General_Concept
to	O
be	O
set	O
by	O
the	O
body	O
,	O
and	O
thus	O
permits	O
shutter	B-Algorithm
priority	I-Algorithm
and	O
program	O
auto	O
exposure	O
modes	O
.	O
</s>
<s>
It	O
was	O
introduced	O
in	O
1983	O
,	O
and	O
is	O
supported	O
by	O
A-series	O
and	O
P-series	O
bodies	O
;	O
Pentax	B-Application
lenses	O
that	O
support	O
it	O
are	O
marked	O
'	O
SMC	O
Pentax-A	O
'	O
.	O
</s>
<s>
The	O
aperture	B-General_Concept
on	O
the	O
lens	O
is	O
set	O
from	O
the	O
body	O
by	O
the	O
same	O
stop-down	O
lever	O
found	O
on	O
the	O
original	O
K-mount	O
,	O
but	O
on	O
KA-lenses	O
this	O
lever	O
is	O
proportional	O
to	O
the	O
area	O
of	O
the	O
aperture	B-General_Concept
opening	O
,	O
rather	O
than	O
the	O
diameter	O
as	O
on	O
previous	O
lenses	O
.	O
</s>
<s>
This	O
allows	O
the	O
body	O
to	O
easily	O
set	O
a	O
specific	O
aperture	B-General_Concept
,	O
since	O
the	O
relationship	O
to	O
F	O
stops	O
is	O
linear	O
.	O
</s>
<s>
The	O
lenses	O
add	O
an	O
'	O
A	O
 '	O
setting	O
on	O
the	O
aperture	B-General_Concept
dial	O
,	O
which	O
gives	O
the	O
body	O
control	O
of	O
the	O
aperture	B-General_Concept
.	O
</s>
<s>
Other	O
,	O
numeric	O
settings	O
are	O
used	O
for	O
manual	O
aperture	B-General_Concept
modes	O
—	O
aperture	B-Algorithm
priority	I-Algorithm
and	O
full	O
manual	O
mode	O
.	O
</s>
<s>
One	O
is	O
slightly	O
recessed	O
and	O
allows	O
the	O
lens	O
to	O
indicate	O
whether	O
the	O
aperture	B-General_Concept
ring	O
is	O
set	O
at	O
'	O
A	O
 '	O
or	O
not	O
.	O
</s>
<s>
The	O
other	O
five	O
contacts	O
are	O
used	O
to	O
encode	O
the	O
lens	O
's	O
aperture	B-General_Concept
range	O
.	O
</s>
<s>
Two	O
contacts	O
encode	O
the	O
lens	O
's	O
minimum	O
aperture	B-General_Concept
—	O
,	O
,	O
or	O
;	O
although	O
no	O
Pentax	B-Application
K-mount	O
lens	O
has	O
ever	O
had	O
an	O
minimum	O
aperture	B-General_Concept
,	O
OEM	O
lenses	O
often	O
have	O
.	O
</s>
<s>
The	O
other	O
three	O
contacts	O
encode	O
the	O
lens	O
's	O
maximum	O
aperture	B-General_Concept
;	O
their	O
meaning	O
is	O
dependent	O
on	O
the	O
minimum	O
aperture	B-General_Concept
indicated	O
by	O
the	O
lens	O
.	O
</s>
<s>
(	O
There	O
are	O
at	O
least	O
2	O
newer	O
lenses	O
that	O
have	O
a	O
minimum	O
aperture	B-General_Concept
of	O
only	O
f/16	O
:	O
HD	O
D	O
FA	O
85mm	O
F1.4	O
and	O
HD	O
D	O
FA*	O
50mm	O
F1.4	O
.	O
</s>
<s>
The	O
KAF-mount	O
was	O
Pentax	B-Application
's	O
second	O
and	O
much	O
improved	O
attempt	O
at	O
adding	O
auto-focus	O
to	O
lenses	O
.	O
</s>
<s>
The	O
MZ-30/ZX	O
-30	O
,	O
MZ-50/ZX	O
-50	O
,	O
MZ-60/ZX	O
-60	O
,	O
the	O
*	O
ist	O
series	O
and	O
the	O
K100D/K110D	O
lack	O
the	O
mechanical	O
stop-down	O
coupler/indicator	O
.	O
</s>
<s>
In	O
these	O
cameras	O
–	O
in	O
aperture	B-Algorithm
priority	I-Algorithm
mode	I-Algorithm
–	O
the	O
aperture	B-General_Concept
is	O
set	O
by	O
a	O
dial	O
on	O
the	O
camera	O
body	O
,	O
and	O
no	O
longer	O
on	O
the	O
lens	O
.	O
</s>
<s>
Since	O
the	O
introduction	O
of	O
the	O
K10D	B-Algorithm
digital	B-Device
SLR	I-Device
model	O
,	O
they	O
are	O
mainly	O
used	O
for	O
powering	O
Silent	O
Drive	O
Motor	O
and	O
DC	O
motor	O
lenses	O
.	O
</s>
<s>
The	O
K10D/K100D	O
Super	O
and	O
later	O
cameras	O
do	O
not	O
have	O
a	O
mechanical	O
stop-down	O
coupler/indicator	O
and	O
thus	O
can	O
only	O
use	O
stop-down	O
metering	O
on	O
pre-A	O
lenses	O
.	O
</s>
<s>
The	O
KAF3-mount	O
is	O
used	O
on	O
Pentax	B-Application
lenses	O
that	O
solely	O
rely	O
on	O
SDM	O
or	O
DC	O
autofocus	O
motors	O
.	O
</s>
<s>
The	O
KAF4-mount	O
was	O
introduced	O
in	O
June	O
2016	O
with	O
the	O
HD	O
Pentax-DA	O
55-300mm	O
F4.5-6.3	O
ED	O
PLM	O
WR	O
RE	O
lens	O
.	O
</s>
<s>
It	O
is	O
identical	O
with	O
KAF3	O
,	O
apart	O
from	O
the	O
missing	O
aperture	B-General_Concept
control	O
lever	O
.	O
</s>
<s>
Instead	O
,	O
aperture	B-General_Concept
control	O
information	O
is	O
transmitted	O
digitally	O
through	O
the	O
data	O
pin	O
and	O
the	O
aperture	B-General_Concept
is	O
stopped	O
down	O
through	O
a	O
motor	O
built	O
into	O
the	O
lens	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
its	O
introduction	O
,	O
the	O
following	O
Pentax	B-Application
DSLR	B-Device
bodies	O
were	O
compatible	O
with	O
the	O
new	O
mount	O
:	O
K-70	B-Algorithm
,	O
K-50	B-Algorithm
,	O
K-S2	B-Algorithm
,	O
K-S1	B-Algorithm
,	O
K-1	B-Algorithm
,	O
K-3	B-Algorithm
II	I-Algorithm
,	O
with	O
all	O
but	O
the	O
K-70	B-Algorithm
requiring	O
a	O
firmware	O
update	O
.	O
</s>
<s>
All	O
digital	O
K-mount	O
Pentax	B-Application
SLR	B-Device
bodies	O
as	O
well	O
as	O
some	O
lower-end	O
film	O
cameras	O
lack	O
the	O
ability	O
to	O
read	O
the	O
position	O
of	O
the	O
aperture	B-General_Concept
simulator	O
.	O
</s>
<s>
This	O
means	O
that	O
lenses	O
that	O
lack	O
the	O
lens	O
information	O
contacts	O
introduced	O
with	O
the	O
KA-mount	O
(	O
Pentax	B-Application
K	O
-	O
and	O
M-series	O
lenses	O
as	O
well	O
as	O
some	O
third-party	O
products	O
)	O
do	O
not	O
support	O
open-aperture	O
metering	O
on	O
these	O
bodies	O
.	O
</s>
<s>
It	O
supports	O
Ricoh	O
's	O
own	O
implementation	O
of	O
shutter	B-Algorithm
priority	I-Algorithm
and	O
auto	O
exposure	O
modes	O
,	O
similar	O
to	O
the	O
KA-mount	O
but	O
much	O
simpler	O
.	O
</s>
<s>
The	O
only	O
addition	O
to	O
the	O
original	O
K-mount	O
is	O
a	O
small	O
pin	O
,	O
commonly	O
dubbed	O
Ricoh	O
pin	O
,	O
at	O
the	O
bottom	O
which	O
tells	O
the	O
body	O
when	O
the	O
aperture	B-General_Concept
ring	O
has	O
been	O
set	O
to	O
the	O
"	O
P	O
"	O
setting	O
(	O
similar	O
to	O
the	O
"	O
A	O
"	O
setting	O
on	O
Pentax	B-Application
KA	O
lenses	O
)	O
.	O
</s>
<s>
The	O
'	O
P	O
 '	O
setting	O
is	O
not	O
compatible	O
with	O
the	O
'	O
A	O
 '	O
setting	O
as	O
the	O
'	O
P	O
 '	O
pin	O
is	O
in	O
a	O
different	O
location	O
than	O
the	O
'	O
A	O
 '	O
contact	O
on	O
Pentax	B-Application
'	O
A	O
 '	O
lenses	O
and	O
the	O
flange	O
on	O
Pentax	B-Application
bodies	O
.	O
</s>
<s>
It	O
is	O
compatible	O
with	O
all	O
other	O
K-mount	O
cameras	O
and	O
lenses	O
when	O
in	O
manual	O
or	O
aperture-priority	B-Algorithm
exposure	O
modes	O
,	O
however	O
the	O
extra	O
pin	O
needs	O
to	O
be	O
removed	O
for	O
safe	O
use	O
on	O
autofocus	O
Pentax	B-Application
cameras	I-Application
,	O
as	O
it	O
can	O
otherwise	O
become	O
locked	O
within	O
the	O
autofocus	O
shaft	O
.	O
</s>
<s>
However	O
,	O
some	O
SLR	B-Device
lenses	O
were	O
made	O
in	O
LTM	O
39	O
mount	O
,	O
mostly	O
by	O
KMZ	O
for	O
use	O
in	O
the	O
early	O
Zenit	B-Application
SLRs	B-Device
which	O
had	O
LT	O
39	O
mounts	O
.	O
</s>
<s>
These	O
"	O
Zenit	B-Application
"	O
TM	O
39	O
lenses	O
will	O
focus	O
properly	O
.	O
</s>
<s>
Or	O
these	O
lenses	O
can	O
be	O
used	O
in	O
conjunction	O
with	O
the	O
M42	B-Algorithm
to	O
LTM	O
39	O
adapter	O
.	O
</s>
<s>
Adaptors	O
can	O
be	O
found	O
to	O
allow	O
use	O
of	O
a	O
non-Leica	O
39mm	O
mount	O
into	O
the	O
K-mount	O
,	O
typically	O
as	O
a	O
M39-M42	O
adapter	O
ring	O
that	O
is	O
mounted	O
in	O
a	O
M42-PK	O
adapter	O
;	O
they	O
may	O
focus	O
to	O
infinity	O
.	O
</s>
<s>
Pentax	B-Application
supplies	O
adapters	O
to	O
fit	O
M42	B-Algorithm
screw-mount	O
lenses	O
,	O
as	O
do	O
several	O
third-party	O
manufacturers	O
.	O
</s>
<s>
The	O
M42	B-Algorithm
screw-mount	O
system	O
was	O
used	O
by	O
Pentax	B-Application
prior	O
to	O
the	O
introduction	O
of	O
the	O
K-mount	O
.	O
</s>
<s>
Pentax	B-Application
designed	O
the	O
K-mount	O
wide	O
enough	O
to	O
allow	O
an	O
adapter	O
to	O
fit	O
between	O
the	O
M42	B-Algorithm
thread	O
and	O
the	O
K	O
bayonet	O
.	O
</s>
<s>
They	O
also	O
kept	O
the	O
same	O
flange	O
focal	O
distance	O
(	O
also	O
called	O
registration	O
distance	O
or	O
register	O
)	O
as	O
the	O
M42	B-Algorithm
screw-mount	O
,	O
so	O
that	O
M42	B-Algorithm
lenses	O
focus	O
correctly	O
using	O
the	O
correct	O
adapter	O
(	O
such	O
as	O
Pentax	B-Application
original	O
or	O
Bower	O
)	O
.	O
</s>
<s>
There	O
is	O
great	O
debate	O
in	O
the	O
Pentax	B-Application
community	O
over	O
the	O
applicability	O
and	O
safety	O
of	O
adapters	O
other	O
than	O
those	O
supplied	O
by	O
Pentax	B-Application
.	O
</s>
<s>
Official	O
Pentax	B-Application
adapters	O
,	O
and	O
flanged	O
non-infinity-focus	O
adapters	O
,	O
do	O
not	O
provoke	O
such	O
problems	O
.	O
</s>
<s>
Many	O
old	O
M42	B-Algorithm
lenses	O
have	O
a	O
modern-day	O
cult	O
reputation	O
,	O
including	O
the	O
(	O
Pentax	B-Application
)	O
Asahi	O
Takumar	O
range	O
.	O
</s>
<s>
Some	O
manufacturers	O
,	O
including	O
Carl	O
Zeiss	O
AG	O
,	O
still	O
make	O
lenses	O
in	O
the	O
M42-mount	B-Algorithm
.	O
</s>
<s>
K-mount	O
cameras	O
have	O
a	O
suitable	O
flange	O
focal	O
distance	O
(	O
45.46mm	O
)	O
to	O
adapt	O
old	O
M42	B-Algorithm
lenses	O
without	O
any	O
optical	O
correction	O
or	O
loss	O
of	O
infinity	O
focus/changed	O
close	O
focus	O
distance	O
.	O
</s>
<s>
Other	O
SLRs	B-Device
with	O
a	O
short	O
flange-focal	O
distance	O
can	O
accept	O
M42	B-Algorithm
lenses	O
as	O
well	O
:	O
Canon	B-Application
EF-mount	I-Application
(	O
44.00mm	O
)	O
,	O
Sony	O
and	O
(	O
Konica	O
)	O
Minolta	B-Algorithm
A-mount	I-Algorithm
(	O
44.50mm	O
)	O
,	O
Sigma	O
(	O
44mm	O
)	O
,	O
Olympus	O
4/3rd	O
(	O
38.67mm	O
)	O
,	O
and	O
many	O
more	O
,	O
but	O
notably	O
not	O
Nikon	B-Algorithm
F-mount	O
(	O
46.5mm	O
)	O
.	O
</s>
<s>
Optically	O
corrected	O
adapter	O
to	O
use	O
Nikon	B-Algorithm
AIS	O
AI	O
lenses	O
on	O
K-mount	O
.	O
</s>
<s>
Adapter	O
for	O
Voigtländer	B-Algorithm
Bessamatic	I-Algorithm
and	O
Voigtländer	B-Algorithm
Ultramatic	I-Algorithm
lenses	O
,	O
Kodak	B-Algorithm
Retina	I-Algorithm
Reflex	I-Algorithm
,	O
or	O
Kodak	O
Retina	O
IIIs	O
lenses	O
.	O
</s>
<s>
Pentax	B-Application
made	O
adapters	O
for	O
its	O
medium-format	O
lenses	O
to	O
use	O
on	O
the	O
K-mount	O
,	O
both	O
the	O
645	O
and	O
6×7	O
,	O
and	O
for	O
the	O
Hasselblad	O
Bayonet	O
type	O
.	O
</s>
<s>
The	O
T-mount	B-Algorithm
was	O
initially	O
developed	O
by	O
Tamron	O
(	O
1957	O
)	O
to	O
allow	O
the	O
easy	O
adaption	O
of	O
generic	O
35mm	O
SLR	B-Device
optics	O
into	O
multiple	O
mounts	O
.	O
</s>
<s>
The	O
T-mount	B-Algorithm
is	O
a	O
42mm	O
diameter	O
0.75mm	O
pitch	O
screw	O
mount	O
with	O
a	O
55mm	O
flange	O
focal	O
distance	O
.	O
</s>
<s>
Because	O
the	O
T-mount	B-Algorithm
is	O
still	O
used	O
for	O
many	O
telescopes	O
and	O
microscopes	O
,	O
they	O
are	O
still	O
available	O
new	O
.	O
</s>
<s>
Note	O
that	O
while	O
both	O
T-mount	B-Algorithm
and	O
M42-mount	B-Algorithm
are	O
42mm	O
screw	O
mount	O
systems	O
,	O
and	O
will	O
mount	O
if	O
they	O
are	O
forced	O
,	O
they	O
are	O
not	O
compatible	O
.	O
</s>
<s>
These	O
are	O
adaptors	O
designed	O
by	O
Tamron	O
to	O
allow	O
the	O
transfer	O
of	O
aperture	B-General_Concept
setting	O
from	O
lens	O
to	O
camera	O
or	O
vice	O
verse	O
,	O
including	O
the	O
Adapt-A-matic	O
(	O
1969	O
)	O
,	O
Adaptall	O
(	O
1973	O
)	O
and	O
Adaptall-2	O
(	O
1979	O
)	O
.	O
</s>
<s>
When	O
Pentax	B-Application
introduced	O
the	O
KA-mount	O
in	O
1983	O
Tamron	O
upgraded	O
their	O
Adaptall-2	O
K-mount	O
into	O
an	O
Adaptall-2	O
KA-mount	O
.	O
</s>
<s>
A	O
lot	O
of	O
Sears	O
cameras	O
were	O
made	O
by	O
Ricoh	O
or	O
Chinon	O
and	O
use	O
the	O
Pentax	B-Application
K-mount	O
.	O
</s>
<s>
Angenieux	O
a	O
lens	O
manufacturer	O
in	O
France	O
,	O
mainly	O
known	O
for	O
its	O
movie	O
equipment	O
than	O
for	O
photographic	O
lenses	O
,	O
but	O
it	O
has	O
built	O
optics	O
for	O
Leica	O
,	O
Nikon	B-Algorithm
,	O
Canon	O
and	O
a	O
few	O
K-mount	O
lenses	O
.	O
</s>
<s>
Adapter	O
fitted	O
for	O
use	O
on	O
M42	B-Algorithm
screw	O
thread	O
.	O
</s>
<s>
Carl	O
Zeiss	O
is	O
one	O
of	O
the	O
most	O
prestigious	O
names	O
on	O
the	O
photographic	O
world	O
;	O
it	O
re-launched	O
its	O
line	O
of	O
lenses	O
for	O
the	O
K-mount	O
in	O
2008	O
,	O
mainly	O
due	O
to	O
the	O
growing	O
popularity	O
of	O
both	O
Pentax	B-Application
and	O
Samsung	B-Application
digital	B-Device
SLRs	I-Device
.	O
</s>
<s>
Cima	O
Kogaku	O
had	O
a	O
patented	O
system	O
that	O
allowed	O
them	O
to	O
build	O
common	O
lens	O
bodies	O
,	O
and	O
add	O
the	O
appropriate	O
lens	B-Algorithm
mount	I-Algorithm
at	O
the	O
factory	O
.	O
</s>
<s>
The	O
Pentax	B-Application
version	O
was	O
only	O
K-mount	O
,	O
not	O
KA-mount	O
.	O
</s>
<s>
Cosmicar	O
is	O
a	O
division	O
of	O
Pentax	B-Application
,	O
it	O
commercialized	O
video	O
lenses	O
,	O
but	O
some	O
were	O
released	O
for	O
the	O
K-mount	O
.	O
</s>
<s>
Hoya	O
,	O
a	O
leading	O
manufacturer	O
of	O
optical	O
glass	O
,	O
purchased	O
Pentax	B-Application
in	O
2008	O
.	O
</s>
<s>
Peleng	O
is	O
a	O
lens	O
manufacturer	O
based	O
in	O
Belarus	O
,	O
it	O
was	O
founded	O
in	O
the	O
Soviet	O
era	O
and	O
released	O
most	O
of	O
its	O
lenses	O
for	O
the	O
M42	B-Algorithm
mount	I-Algorithm
,	O
but	O
it	O
has	O
a	O
K-mount	O
lens	O
:	O
</s>
<s>
Bold	O
text	O
indicates	O
lenses	O
in	O
current	O
production/stock	O
sale	O
from	O
Pentax	B-Application
.	O
</s>
<s>
All	O
these	O
lenses	O
had	O
been	O
marketed	O
by	O
Samsung	B-Application
and	O
present	O
on	O
Samsung	B-Application
's	O
GX-series	O
DSLRs	B-Device
.	O
</s>
<s>
Schneider-Kreuznach	O
is	O
a	O
traditional	O
optics	O
maker	O
that	O
do	O
still	O
make	O
specialised	O
glass	O
and	O
lenses	O
(	O
today	O
mainly	O
high-quality	O
large-format	O
lenses	O
,	O
enlarger	O
lens	O
and	O
photographic	O
loupes	O
)	O
,	O
but	O
not	O
for	O
Samsung	B-Application
.	O
</s>
<s>
They	O
license	O
their	O
name	O
to	O
Samsung	B-Application
granted	O
that	O
certain	O
minimum	O
quality	O
requirements	O
are	O
fulfilled	O
.	O
</s>
<s>
All	O
the	O
Schneider	O
branded	O
glass	O
from	O
Samsung	B-Application
is	O
manufactured	O
by	O
Pentax	B-Application
and	O
corresponds	O
directly	O
to	O
Pentax	B-Application
lenses	O
.	O
</s>
<s>
After	O
the	O
launch	O
of	O
the	O
K10D	B-Algorithm
digital	B-Device
SLR	I-Device
it	O
launched	O
K-mount	O
D	O
series	O
lenses	O
.	O
</s>
<s>
Such	O
ones	O
are	O
designed	O
to	O
be	O
used	O
with	O
the	O
APS	B-Architecture
size	O
camera	O
,	O
but	O
older	O
K-mount	O
can	O
be	O
used	O
as	O
well	O
.	O
</s>
<s>
An	O
increase	O
in	O
model	O
numbers	O
can	O
be	O
seen	O
between	O
2007	O
and	O
2008	O
due	O
to	O
the	O
success	O
of	O
the	O
K10D	B-Algorithm
,	O
K100D	B-Algorithm
,	O
K100D	B-Algorithm
Super	I-Algorithm
,	O
K110D	B-Algorithm
,	O
K20D	B-Algorithm
and	O
K200D	B-Algorithm
cameras	O
.	O
</s>
<s>
It	O
is	O
important	O
to	O
distinguish	O
the	O
adaptall	O
versions	O
from	O
everything	O
else	O
,	O
the	O
adaptall	O
is	O
a	O
generic	O
adapter	O
that	O
allowed	O
Tamron	O
to	O
manufacture	O
a	O
single	B-Algorithm
lens	I-Algorithm
design	O
for	O
a	O
wide	O
range	O
of	O
cameras	O
,	O
and	O
commercialize	O
those	O
for	O
specific	O
brands	O
with	O
the	O
use	O
of	O
the	O
Adaptall	O
I	O
and	O
Adaptall	O
II	O
adapters	O
.	O
</s>
<s>
Cosina	B-Algorithm
Voigtländer	I-Algorithm
Color-Heliar	O
75mm	O
f2.5	O
(	O
2002-200	O
?	O
)	O
</s>
<s>
Most	O
Zenitar	O
lenses	O
are	O
also	O
available	O
in	O
M42-mount	B-Algorithm
.	O
</s>
