<s>
The	O
HD	O
Pentax	B-Algorithm
DA	I-Algorithm
55-300mm	I-Algorithm
lens	I-Algorithm
,	O
is	O
a	O
telezoom	O
lens	O
line	O
for	O
the	O
Pentax	B-Algorithm
K-mount	I-Algorithm
.	O
</s>
<s>
The	O
first	O
generation	O
was	O
the	O
SMC	B-Algorithm
Pentax-DA	I-Algorithm
55-300mm	I-Algorithm
F4-5.8	I-Algorithm
ED	I-Algorithm
,	O
green	O
side	O
band	O
.	O
</s>
<s>
The	O
second	O
generation	O
was	O
the	O
SMC	O
Pentax-DA	O
L	O
55-300mm	O
F4-5.8	O
ED	O
,	O
silver	O
side	O
band	O
"	O
plastic	O
fantastic	O
"	O
.	O
</s>
<s>
The	O
third	O
generation	O
of	O
this	O
lens	O
line	O
up	O
is	O
the	O
HD	O
Pentax	B-Application
DA	O
55-300mm	O
F4.0-5.8	O
ED	O
WR	O
,	O
red	O
side	O
band	O
,	O
released	O
in	O
2013	O
.	O
</s>
<s>
The	O
fourth	O
generation	O
HD	O
Pentax-DA	O
55-300mm	O
f/4.5	O
-6.3	O
ED	O
PLM	O
WR	O
RE	O
,	O
no	O
side	O
band	O
,	O
green	O
front	O
band	O
,	O
was	O
released	O
in	O
2016	O
.	O
</s>
<s>
It	O
requires	O
the	O
KAF4	O
lens	O
mount	O
,	O
so	O
Pentax	B-Application
DSLRs	O
before	O
2013	O
are	O
not	O
able	O
to	O
use	O
this	O
lens	O
.	O
</s>
<s>
Some	O
models	O
,	O
such	O
as	O
the	O
Pentax	B-Algorithm
K-30	I-Algorithm
,	O
can	O
potentially	O
bypass	O
this	O
limitation	O
by	O
running	O
a	O
"	O
hacked	O
"	O
Pentax	B-Algorithm
K-50	I-Algorithm
firmware	O
.	O
</s>
