<s>
The	O
Pentax	B-Application
smc	O
DA	O
21mm	O
F3.2	O
AL	O
Limited	O
is	O
a	O
moderate	O
wide	O
angle	O
lens	O
announced	O
by	O
Pentax	B-Application
on	O
February	O
13	O
,	O
2006	O
.	O
</s>
<s>
It	O
is	O
one	O
of	O
the	O
five	O
very	O
compact	O
"	O
Limited	O
"	O
prime	O
lenses	O
for	O
APS-C	B-Algorithm
format	O
cameras	O
.	O
</s>
