<s>
Canon	O
makes	O
several	O
lenses	O
for	O
the	O
EF	B-Application
lens	I-Application
mount	I-Application
and	O
EF-S	B-Algorithm
lens	I-Algorithm
mount	I-Algorithm
that	O
are	O
well-suited	O
for	O
portrait	O
photography	O
.	O
</s>
<s>
Lenses	O
that	O
fit	O
these	O
criteria	O
on	O
a	O
full-frame	B-Algorithm
camera	I-Algorithm
are	O
:	O
</s>
<s>
When	O
used	O
with	O
DSLRs	O
with	O
cropped	O
sensors	O
,	O
notably	O
the	O
APS-C-sized	O
sensor	O
with	O
1.6	O
crop	O
factor	O
(	O
such	O
as	O
the	O
popular	O
Canon	B-Algorithm
EOS	I-Algorithm
600D	I-Algorithm
,	O
also	O
known	O
as	O
the	O
"	O
Digital	O
Rebel	B-Algorithm
T3i	I-Algorithm
"	O
or	O
"	O
EOS	O
Kiss	O
Digital	O
X5	O
"	O
)	O
,	O
one	O
instead	O
uses	O
50mm	O
–	O
85mm	O
lenses	O
,	O
as	O
these	O
provide	O
a	O
35	O
mm	O
equivalent	O
focal	O
length	O
of	O
80mm	O
–	O
136mm	O
.	O
</s>
