<s>
The	O
Pentax	B-Algorithm
645Z	I-Algorithm
is	O
a	O
professional	O
medium	O
format	O
digital	O
SLR	O
camera	O
announced	O
by	O
Ricoh	O
on	O
April	O
15	O
,	O
2014	O
.	O
</s>
<s>
The	O
most	O
notable	O
improvements	O
over	O
its	O
predecessor	O
,	O
the	O
Pentax	B-Algorithm
645D	I-Algorithm
,	O
include	O
much	O
lower	O
noise	O
at	O
high	O
ISO	O
,	O
the	O
ability	O
to	O
record	O
video	O
(	O
FullHD	O
at	O
30	O
frames	O
per	O
second	O
)	O
,	O
and	O
a	O
tilting	O
rear	O
display	O
.	O
</s>
