<s>
The	O
Canon	B-Algorithm
RF	I-Algorithm
lens	I-Algorithm
mount	I-Algorithm
is	O
an	O
interchangeable-lens	O
mount	O
developed	O
by	O
Canon	O
for	O
its	O
full-frame	B-Device
mirrorless	I-Device
interchangeable-lens	I-Device
cameras	I-Device
,	O
and	O
featured	O
first	O
by	O
the	O
EOS	B-Algorithm
R	I-Algorithm
,	O
followed	O
by	O
the	O
EOS	B-Algorithm
RP	I-Algorithm
.	O
</s>
<s>
The	O
RF	B-Algorithm
mount	I-Algorithm
was	O
announced	O
in	O
September	O
2018	O
.	O
</s>
<s>
In	O
May	O
2022	O
,	O
Canon	O
announced	O
APS-C	B-Algorithm
EOS	B-Algorithm
R	I-Algorithm
cameras	O
(	O
the	O
EOS	O
R10	O
and	O
EOS	B-Algorithm
R7	I-Algorithm
)	O
and	O
RF-S	O
lenses	O
designed	O
for	O
these	O
cameras	O
.	O
</s>
<s>
The	O
RF	B-Algorithm
mount	I-Algorithm
allows	O
for	O
the	O
use	O
of	O
Canon	B-Application
EF	I-Application
and	O
EF-S	B-Algorithm
mount	I-Algorithm
lenses	O
using	O
one	O
of	O
three	O
Canon-made	O
lens	O
adapters	O
.	O
</s>
<s>
When	O
an	O
RF-S	O
or	O
EF-S	B-Algorithm
lens	I-Algorithm
is	O
attached	O
,	O
however	O
,	O
the	O
camera	O
will	O
only	O
function	O
as	O
an	O
APS-C	B-Algorithm
camera	O
,	O
not	O
a	O
full-frame	O
camera	O
.	O
</s>
<s>
Canon	O
full-frame	B-Algorithm
cameras	I-Algorithm
have	O
used	O
the	O
EF	B-Application
lens	I-Application
mount	I-Application
since	O
1987	O
.	O
</s>
<s>
In	O
comparison	O
with	O
that	O
mount	O
,	O
the	O
RF	B-Algorithm
mount	I-Algorithm
's	O
inner	O
diameter	O
is	O
the	O
same	O
at	O
54mm	O
.	O
</s>
<s>
The	O
RF	B-Algorithm
mount	I-Algorithm
's	O
flange	O
focal	O
distance	O
at	O
20mm	O
is	O
much	O
shorter	O
than	O
that	O
of	O
the	O
Canon	B-Application
EF	I-Application
and	O
EF-S	B-Algorithm
mounts	I-Algorithm
at	O
44mm	O
.	O
</s>
<s>
The	O
EF-M	B-Algorithm
mount	O
has	O
a	O
flange	O
focal	O
distance	O
of	O
18mm	O
.	O
</s>
<s>
An	O
EF-EOS	O
R	O
lens	O
adapter	O
enables	O
Canon	B-Application
EF	I-Application
,	O
EF-S	B-Algorithm
,	O
TS-E	B-Algorithm
and	O
MP-E	O
lenses	O
to	O
be	O
used	O
on	O
cameras	O
that	O
have	O
the	O
RF	B-Algorithm
mount	I-Algorithm
.	O
</s>
<s>
Drop-In	O
Filter	O
Mount	O
Adapter	O
EF-EOS	O
R	O
–	O
the	O
Mount	O
Adapter	O
EF-EOS	O
R	O
with	O
the	O
ability	O
to	O
use	O
drop-in	O
filters	O
,	O
either	O
a	O
variable	O
neutral	O
density	O
(	O
V-ND	O
)	O
filter	O
or	O
circular	O
polarising	O
(	O
C-PL	O
)	O
filter	O
,	O
and	O
a	O
clear	O
(	O
CL	O
)	O
filter	O
,	O
released	O
in	O
2019	O
.	O
</s>
<s>
If	O
an	O
EF-EOS	O
R	O
Mount	O
Adapter	O
is	O
used	O
to	O
mount	O
an	O
EF-S	B-Algorithm
lens	I-Algorithm
,	O
the	O
image	O
will	O
have	O
to	O
be	O
cropped	O
by	O
1.6x	O
due	O
to	O
the	O
smaller	O
image	O
circle	O
on	O
EF-S	B-Algorithm
lenses	I-Algorithm
.	O
</s>
<s>
RF	O
35mm	O
F1.8	O
MACRO	O
IS	O
STM	B-Algorithm
—	O
0.5	O
×	O
maximum	O
magnification	O
.	O
</s>
<s>
In	O
conjunction	O
with	O
the	O
February	O
2019	O
announcement	O
of	O
the	O
entry-level	O
full-frame	O
EOS	B-Algorithm
RP	I-Algorithm
,	O
Canon	O
announced	O
six	O
additional	O
lenses	O
would	O
be	O
released	O
by	O
the	O
end	O
of	O
that	O
year	O
,	O
although	O
it	O
did	O
not	O
indicate	O
release	O
dates	O
for	O
any	O
of	O
them	O
:	O
</s>
<s>
In	O
2020	O
,	O
Canon	O
introduced	O
7	O
new	O
RF	B-Algorithm
mount	I-Algorithm
lenses	O
:	O
</s>
<s>
In	O
2021	O
,	O
Canon	O
introduced	O
7	O
new	O
RF	B-Algorithm
mount	I-Algorithm
lenses	O
:	O
</s>
<s>
In	O
2022	O
,	O
Canon	O
introduced	O
the	O
first	O
RF-S	O
lenses	O
(	O
RF-S	O
18-150mm	O
and	O
the	O
RF-S	O
18-45mm	O
)	O
for	O
APS-C	B-Algorithm
Sensors	O
,	O
together	O
with	O
the	O
R7	O
and	O
R10	O
camera	O
bodies	O
with	O
the	O
first	O
built	O
in	O
APS-C	B-Algorithm
Sensor	O
in	O
the	O
R-System	O
.	O
</s>
<s>
In	O
2022	O
,	O
Canon	O
introduced	O
seven	O
new	O
RF	B-Algorithm
mount	I-Algorithm
lenses	O
:	O
</s>
<s>
RF-mount	O
lenses	O
are	O
not	O
compatible	O
with	O
EF	B-Application
,	O
EF-S	B-Algorithm
or	O
EF-M	B-Algorithm
mount	O
camera	O
bodies	O
.	O
</s>
<s>
The	O
cameras	O
that	O
can	O
use	O
the	O
RF	B-Algorithm
mount	I-Algorithm
are	O
:	O
</s>
