<s>
Advanced	O
Photo	O
System	O
type-C	O
(	O
APS-C	B-Algorithm
)	O
is	O
an	O
image	B-Algorithm
sensor	I-Algorithm
format	I-Algorithm
approximately	O
equivalent	O
in	O
size	O
to	O
the	O
Advanced	O
Photo	O
System	O
film	O
negative	O
in	O
its	O
C	O
(	O
"	O
Classic	O
"	O
)	O
format	O
,	O
of	O
25.1	O
×	O
16.7mm	O
,	O
an	O
aspect	O
ratio	O
of	O
3:2	O
and	O
Ø31.15mm	O
field	O
diameter	O
.	O
</s>
<s>
Sensors	O
approximating	O
these	O
dimensions	O
are	O
used	O
in	O
many	O
digital	B-Device
single-lens	I-Device
reflex	I-Device
cameras	I-Device
(	O
DSLRs	B-Device
)	O
,	O
mirrorless	B-Device
interchangeable-lens	I-Device
cameras	I-Device
(	O
MILCs	B-Device
)	O
,	O
and	O
a	O
few	O
large-sensor	O
live-preview	B-Device
digital	I-Device
cameras	I-Device
.	O
</s>
<s>
APS-C	B-Algorithm
size	O
sensors	O
are	O
also	O
used	O
in	O
a	O
few	O
digital	O
rangefinders	B-Algorithm
.	O
</s>
<s>
All	O
APS-C	B-Algorithm
variants	O
are	O
considerably	O
smaller	O
than	O
35mm	O
standard	O
film	O
which	O
measures	O
36×24mm	O
.	O
</s>
<s>
Because	O
of	O
this	O
,	O
devices	O
with	O
APS-C	B-Algorithm
sensors	O
are	O
known	O
as	O
"	O
cropped	O
frame	O
,	O
"	O
especially	O
when	O
used	O
in	O
connection	O
with	O
lens	O
mounts	O
that	O
are	O
also	O
used	O
with	O
sensors	O
the	O
size	O
of	O
35mm	O
film	O
:	O
only	O
part	O
of	O
the	O
image	O
produced	O
by	O
the	O
lens	O
is	O
captured	O
by	O
the	O
APS-C	B-Algorithm
size	O
sensor	O
.	O
</s>
<s>
Sensor	B-Algorithm
sizes	I-Algorithm
range	O
from	O
20.7	O
×	O
13.8mm	O
to	O
28.7	O
×	O
19.1mm	O
,	O
but	O
are	O
typically	O
22.3	O
×	O
14.9mm	O
for	O
Canon	O
and	O
23.5	O
×	O
15.6mm	O
for	O
other	O
manufacturers	O
.	O
</s>
<s>
Each	O
variant	O
results	O
in	O
a	O
slightly	O
different	O
angle	O
of	O
view	O
from	O
lenses	O
at	O
the	O
same	O
focal	B-Algorithm
length	I-Algorithm
and	O
overall	O
a	O
much	O
narrower	O
angle	O
of	O
view	O
compared	O
to	O
35	O
mm	O
film	O
.	O
</s>
<s>
An	O
APS-C	B-Algorithm
sensor	O
is	O
able	O
to	O
capture	O
more	O
total	O
light	O
than	O
a	O
smaller	O
sensor	O
with	O
equivalent	O
technology	O
due	O
to	O
its	O
larger	O
size	O
.	O
</s>
<s>
This	O
results	O
in	O
less	O
image	O
noise	O
and	O
shallower	O
depth	O
of	O
field	O
than	O
a	O
smaller	O
sensor	O
taking	O
a	O
picture	O
with	O
the	O
same	O
focal	B-Algorithm
length	I-Algorithm
,	O
f-stop	O
,	O
aperture	O
,	O
and	O
ISO	O
.	O
</s>
<s>
However	O
,	O
as	O
an	O
APS-C	B-Algorithm
sensor	O
is	O
smaller	O
than	O
a	O
full-frame	B-Algorithm
camera	I-Algorithm
or	O
Medium	O
Format	O
sensor	O
,	O
the	O
opposite	O
holds	O
true	O
,	O
with	O
larger	O
sensors	O
having	O
less	O
image	O
noise	O
and	O
shallower	O
depth	O
of	O
field	O
than	O
the	O
APS-C	B-Algorithm
sensor	O
when	O
taking	O
a	O
picture	O
with	O
the	O
same	O
focal	B-Algorithm
length	I-Algorithm
,	O
f-stop	O
,	O
aperture	O
,	O
and	O
ISO	O
.	O
</s>
<s>
Most	O
DSLR	B-Device
and	O
third	O
party	O
lens	O
manufacturers	O
now	O
make	O
lenses	O
specifically	O
designed	O
for	O
APS-C	B-Algorithm
cameras	O
.	O
</s>
<s>
A	O
crop	O
factor	O
(	O
sometimes	O
referred	O
to	O
as	O
a	O
"	O
focal	B-Algorithm
length	I-Algorithm
multiplier	O
"	O
for	O
comparing	O
a	O
proportionally	O
scaled	O
lens/image	O
circle	O
projection/sensor	O
diameter	O
)	O
can	O
be	O
used	O
to	O
calculate	O
the	O
field	O
of	O
view	O
in	O
35	O
mm	O
terms	O
from	O
the	O
actual	O
focal	B-Algorithm
length	I-Algorithm
.	O
</s>
<s>
‡	O
A	O
1.3	O
×	O
Focal	B-Algorithm
Length	I-Algorithm
Multiplier	O
is	O
also	O
known	O
as	O
APS-H	O
.	O
Actual	O
multiplier	O
factor	O
is	O
1.255	O
×	O
for	O
the	O
1D	O
Digital	O
,	O
1.28	O
×	O
for	O
the	O
Canon	B-Algorithm
EOS-1D	I-Algorithm
Mark	I-Algorithm
III	I-Algorithm
and	O
1.29	O
×	O
for	O
the	O
Canon	B-Algorithm
EOS-1D	I-Algorithm
Mark	I-Algorithm
IV	I-Algorithm
.	O
</s>
<s>
Canon	O
,	O
Fujifilm	O
,	O
Nikon	B-Algorithm
,	O
Pentax	B-Application
and	O
Sony	O
have	O
developed	O
and	O
designed	O
lenses	O
specifically	O
for	O
their	O
cameras	O
with	O
a	O
lens	O
factor	O
(	O
more	O
fully	O
,	O
lens	O
focal	B-Algorithm
length	I-Algorithm
conversion	O
factor	O
)	O
or	O
"	O
crop	O
factor	O
"	O
.	O
</s>
<s>
APS-C	B-Algorithm
cameras	O
use	O
a	O
smaller	O
area	O
to	O
form	O
the	O
image	O
than	O
traditional	O
35mm	O
cameras	O
,	O
and	O
so	O
lenses	O
used	O
on	O
APS-C	B-Algorithm
format	O
cameras	O
have	O
a	O
correspondingly	O
narrower	O
field	O
of	O
view	O
.	O
</s>
<s>
But	O
the	O
same	O
lens	O
on	O
an	O
APS-C	B-Algorithm
camera	O
,	O
with	O
a	O
lens	O
factor	O
of	O
1.6	O
×	O
(	O
relative	O
to	O
a	O
standard	O
full-frame	O
35mm	O
format	O
camera	O
)	O
,	O
has	O
the	O
same	O
angle	O
of	O
view	O
as	O
a	O
45mm	O
(	O
28mm	O
×	O
1.6	O
lens	O
factor	O
)	O
lens	O
on	O
a	O
35mm	O
camera	O
—	O
i.e.	O
</s>
<s>
Several	O
third-party	O
lens	O
manufacturers	O
,	O
such	O
as	O
Tamron	O
,	O
Tokina	O
,	O
and	O
Sigma	O
,	O
also	O
manufacture	O
a	O
range	O
of	O
lenses	O
optimised	O
for	O
APS-C	B-Algorithm
sensors	O
.	O
</s>
<s>
Canon	O
introduced	O
the	O
Canon	B-Algorithm
EF-S	I-Algorithm
line	I-Algorithm
of	O
lenses	O
in	O
2003	O
alongside	O
the	O
300D	O
.	O
</s>
<s>
These	O
lenses	O
place	O
the	O
rear	O
of	O
the	O
lens	O
closer	O
to	O
the	O
camera	O
's	O
sensor	O
(	O
referred	O
to	O
as	O
short	B-Algorithm
back	I-Algorithm
focus	I-Algorithm
)	O
.	O
</s>
<s>
EF-S	B-Algorithm
lenses	I-Algorithm
are	O
compatible	O
with	O
Canon	O
's	O
APS-C	B-Algorithm
digital	B-Device
SLRs	I-Device
,	O
with	O
the	O
exception	O
of	O
the	O
early	O
Canon	B-Device
EOS	I-Device
D30	I-Device
,	O
Canon	B-Device
EOS	I-Device
D60	I-Device
,	O
and	O
Canon	B-Algorithm
EOS	I-Algorithm
10D	I-Algorithm
,	O
which	O
predated	O
the	O
introduction	O
of	O
the	O
mounting	O
system	O
.	O
</s>
<s>
EF-S	B-Algorithm
lenses	I-Algorithm
will	O
not	O
physically	O
mount	O
on	O
Canon	O
's	O
full-frame	O
digital	O
or	O
35mm	O
film	O
SLRs	O
.	O
</s>
<s>
More	O
recently	O
,	O
the	O
company	O
introduced	O
the	O
EF-M	B-Algorithm
line	I-Algorithm
for	O
its	O
EOS	B-Algorithm
M	I-Algorithm
series	O
of	O
mirrorless	B-Device
interchangeable-lens	I-Device
cameras	I-Device
(	O
MILCs	B-Device
)	O
.	O
</s>
<s>
EF-M	B-Algorithm
lenses	I-Algorithm
will	O
not	O
physically	O
mount	O
on	O
any	O
Canon	O
SLR	O
,	O
whether	O
film	O
or	O
digital	O
.	O
</s>
<s>
The	O
rear	O
of	O
an	O
EF-M	B-Algorithm
lens	I-Algorithm
is	O
considerably	O
closer	O
to	O
the	O
sensor	O
or	O
film	O
plane	O
than	O
that	O
of	O
an	O
EF	O
(	O
full-frame/35mm	O
)	O
or	O
EF-S	B-Algorithm
lens	I-Algorithm
.	O
</s>
<s>
Canon	O
sells	O
an	O
optional	O
adapter	O
that	O
allows	O
EF-M	B-Algorithm
bodies	O
to	O
accept	O
all	O
EF	O
and	O
EF-S	B-Algorithm
lenses	I-Algorithm
.	O
</s>
<s>
Fujifilm	O
debuted	O
their	O
X-mount	B-Algorithm
range	O
of	O
lenses	O
in	O
early	O
2012	O
.	O
</s>
<s>
These	O
lenses	O
are	O
designed	O
for	O
their	O
X	B-Device
series	I-Device
cameras	O
using	O
APS-C	B-Algorithm
sensors	O
.	O
</s>
<s>
Nikon	B-Algorithm
makes	O
DX	O
format	O
lenses	O
for	O
their	O
line	O
of	O
APS-C	B-Algorithm
digital	O
cameras	O
.	O
</s>
<s>
These	O
can	O
be	O
physically	O
mounted	O
to	O
all	O
Nikon	B-Algorithm
digital	O
and	O
film	O
SLR	O
camera	O
bodies	O
since	O
1977	O
.	O
</s>
<s>
These	O
lenses	O
generally	O
exhibit	O
vignetting	O
at	O
shorter	O
focal	B-Algorithm
lengths	I-Algorithm
when	O
mounted	O
on	O
Nikon	B-Algorithm
film	O
bodies	O
,	O
but	O
are	O
typically	O
usable	O
at	O
longer	O
focal	B-Algorithm
lengths	I-Algorithm
.	O
</s>
<s>
When	O
mounted	O
on	O
a	O
Nikon	B-Algorithm
FX	I-Algorithm
(	O
full-frame	O
)	O
digital	O
body	O
,	O
by	O
default	O
the	O
camera	O
will	O
automatically	O
adjust	O
the	O
viewfinder	O
to	O
depict	O
the	O
DX	O
frame	O
area	O
and	O
crop	O
the	O
captured	O
images	O
to	O
the	O
DX	O
image	O
size	O
.	O
</s>
<s>
Pentax	B-Application
produces	O
the	O
DA	O
line	O
for	O
their	O
APS-C	B-Algorithm
cameras	O
.	O
</s>
<s>
These	O
lenses	O
are	O
available	O
in	O
focal	B-Algorithm
lengths	I-Algorithm
that	O
offer	O
similar	O
field-of-view	O
as	O
lenses	O
previously	O
available	O
for	O
135	O
film	O
.	O
</s>
<s>
The	O
trademark	O
compact	O
design	O
of	O
the	O
DA	O
limited	O
series	O
takes	O
advantage	O
of	O
the	O
smaller	O
APS-C	B-Algorithm
format	O
with	O
the	O
lenses	O
under	O
40mm	O
and	O
is	O
fully	O
usable	O
on	O
135	O
Film	O
with	O
the	O
DA	O
Limited	O
Lenses	O
over	O
35mm	O
focal	B-Algorithm
length	I-Algorithm
.	O
</s>
<s>
All	O
DA	O
lenses	O
can	O
be	O
mounted	O
on	O
Pentax	B-Application
film	O
bodies	O
,	O
albeit	O
with	O
increased	O
vignetting	O
.	O
</s>
<s>
Sony	O
has	O
two	O
lines	O
specifically	O
designed	O
for	O
their	O
APS-C	B-Algorithm
cameras	O
—	O
the	O
DT	B-Algorithm
line	O
for	O
their	O
A-mount	B-Algorithm
DSLRs	B-Device
and	O
α	B-Algorithm
SLTs	O
,	O
and	O
the	O
E-mount	B-Algorithm
for	O
their	O
α	B-Algorithm
MILCs	B-Device
.	O
</s>
<s>
The	O
DT	B-Algorithm
lenses	O
can	O
be	O
mounted	O
on	O
any	O
Sony	B-Algorithm
A-mount	I-Algorithm
camera	O
,	O
but	O
are	O
specifically	O
designed	O
for	O
the	O
DSLR-A100	B-Device
up	O
to	O
DSLR-A700	B-Device
series	O
of	O
APS-C-format	O
DSLRs	B-Device
,	O
the	O
earlier	O
Konica	B-Device
Minolta	I-Device
5D	I-Device
and	O
7D	B-Algorithm
,	O
and	O
the	O
most	O
recent	O
APS-C	B-Algorithm
Alpha	O
SLTs	O
.	O
</s>
<s>
DT	B-Algorithm
lenses	O
can	O
be	O
mounted	O
on	O
full-frame	O
models	O
like	O
the	O
DSLR-A850	B-Algorithm
,	O
DSLR-A900	B-Algorithm
,	O
and	O
SLT-A99	B-Algorithm
in	O
"	O
crop	O
"	O
mode	O
,	O
where	O
the	O
frame	O
is	O
cropped	O
and	O
the	O
resolution	O
is	O
roughly	O
halved	O
.	O
</s>
<s>
E-mount	B-Algorithm
lenses	O
are	O
compatible	O
with	O
all	O
of	O
the	O
company	O
's	O
APS-C	B-Algorithm
MILCs	B-Device
,	O
from	O
the	O
NEX-3	B-Device
and	O
NEX-5	B-Device
through	O
the	O
current	O
α3000	B-Algorithm
,	O
α5100	B-Algorithm
,	O
α6500	B-Algorithm
,	O
and	O
α6600	O
.	O
</s>
<s>
In	O
addition	O
,	O
they	O
can	O
be	O
mounted	O
on	O
Sony	O
full-frame	O
MILCs	B-Device
(	O
α7/α7R/α7S	B-Algorithm
,	O
α7R	B-Algorithm
II	I-Algorithm
,	O
α7S	B-Algorithm
II	I-Algorithm
)	O
in	O
"	O
crop	O
"	O
mode	O
(	O
the	O
company	O
also	O
produces	O
E-mount	B-Algorithm
lenses	O
designated	O
as	O
"	O
FE	O
"	O
,	O
which	O
cover	O
the	O
entire	O
full-frame	O
image	O
circle	O
)	O
.	O
</s>
