<s>
The	O
MP-E65mm	O
f/2.8	O
1-5x	O
Macro	O
Photo	O
is	O
a	O
photographic	O
lens	O
that	O
was	O
released	O
in	O
September	O
1999	O
and	O
is	O
manufactured	O
by	O
Canon	O
for	O
use	O
on	O
the	O
EOS	B-Algorithm
photographic	O
system	O
.	O
</s>
<s>
It	O
is	O
a	O
manual	O
focus	O
lens	O
for	O
the	O
EF	B-Application
mount	I-Application
and	O
is	O
specifically	O
designed	O
for	O
macro	O
photography	O
.	O
</s>
<s>
Unlike	O
other	O
macro	O
lenses	O
,	O
such	O
as	O
the	O
EF50mm	O
f/2.5	O
Compact	O
Macro	O
and	O
the	O
EF-S60mm	B-Algorithm
f/2.8	I-Algorithm
Macro	I-Algorithm
USM	I-Algorithm
,	O
it	O
does	O
not	O
focus	O
to	O
infinity	O
and	O
cannot	O
be	O
used	O
for	O
conventional	O
photography	O
.	O
</s>
<s>
It	O
is	O
capable	O
of	O
generating	O
full-frame	O
images	O
up	O
to	O
ten	O
times	O
the	O
size	O
of	O
the	O
subject	O
with	O
the	O
addition	O
of	O
a	O
2‌×	O
Extender	B-Algorithm
teleconverter	O
.	O
</s>
<s>
The	O
technical	O
specifications	O
indicate	O
an	O
aperture	B-General_Concept
range	O
of	O
f/2.8	O
to	O
f/16	O
,	O
which	O
is	O
the	O
value	O
displayed	O
by	O
the	O
camera	B-Algorithm
body	I-Algorithm
when	O
the	O
focus	O
is	O
set	O
to	O
infinity	O
.	O
</s>
<s>
For	O
example	O
,	O
at	O
3×	O
magnification	O
with	O
a	O
listed	O
aperture	B-General_Concept
of	O
f/8	O
,	O
the	O
effective	O
f-number	O
is	O
8	O
×	O
(	O
3+1	O
)	O
=	O
f/32	O
.	O
</s>
<s>
When	O
a	O
Canon	B-Algorithm
Extender	I-Algorithm
EF	I-Algorithm
is	O
attached	O
,	O
the	O
usual	O
f-number	O
compensation	O
is	O
applied	O
(	O
in	O
the	O
previous	O
example	O
of	O
f/5.6	O
at	O
5×	O
magnification	O
,	O
the	O
effective	O
f-number	O
would	O
be	O
f/180	O
if	O
the	O
Canon	O
Extender	B-Algorithm
2×	O
was	O
attached	O
to	O
the	O
lens	O
.	O
)	O
</s>
<s>
The	O
lens	O
circuitry	O
communicates	O
the	O
chosen	O
magnification	O
ratio	O
to	O
the	O
camera	B-Algorithm
body	I-Algorithm
,	O
so	O
it	O
will	O
be	O
recorded	O
in	O
the	O
image	O
metadata	O
.	O
</s>
<s>
It	O
can	O
be	O
viewed	O
by	O
Exiftool	B-Language
version	O
8.11	O
or	O
later	O
.	O
</s>
<s>
Canon	O
recommends	O
using	O
either	O
aperture	B-Algorithm
priority	I-Algorithm
or	O
manual	O
mode	O
when	O
using	O
this	O
lens	O
.	O
</s>
