<s>
The	O
Sony	B-Device
α7	I-Device
IV	I-Device
(	O
model	O
ILCE-7M4	O
)	O
is	O
a	O
full-frame	B-Device
mirrorless	I-Device
interchangeable-lens	I-Device
camera	I-Device
manufactured	O
by	O
Sony	O
.	O
</s>
<s>
It	O
was	O
announced	O
on	O
21	O
October	O
2021	O
as	O
the	O
successor	O
to	O
the	O
Sony	B-Algorithm
α7	I-Algorithm
III	I-Algorithm
.	O
</s>
<s>
The	O
camera	O
features	O
several	O
advancements	O
from	O
its	O
predecessor	B-Algorithm
the	O
Sony	B-Algorithm
α7	I-Algorithm
III	I-Algorithm
,	O
also	O
incorporating	O
some	O
pro	O
features	O
from	O
the	O
high-end	O
Sony	B-Algorithm
α1	I-Algorithm
.	O
</s>
<s>
580	O
images	O
using	O
LCD	B-Device
screen	I-Device
and	O
approx	O
.	O
</s>
<s>
Independent	O
testing	O
by	O
using	O
Imatest	O
software	O
and	O
a	O
Xyla	O
color	O
range	O
chart	O
demonstrates	O
a	O
dynamic	O
range	O
of	O
12.8	O
stops	O
of	O
light	O
,	O
which	O
is	O
approximately	O
1/3	O
of	O
a	O
stop	O
better	O
than	O
the	O
Sony	B-Algorithm
A7s	I-Algorithm
iii	I-Algorithm
and	O
approximately	O
the	O
same	O
as	O
the	O
Sony	B-Algorithm
a1	I-Algorithm
.	I-Algorithm
</s>
<s>
It	O
color	O
matches	O
fairly	O
well	O
with	O
the	O
Sony	B-Algorithm
A7s	I-Algorithm
iii	I-Algorithm
and	O
Sony	B-Algorithm
a1	I-Algorithm
,	O
with	O
the	O
Sony	B-Algorithm
A7s	I-Algorithm
iii	I-Algorithm
leaning	O
a	O
bit	O
green	O
,	O
the	O
Sony	B-Algorithm
a1	I-Algorithm
a	O
bit	O
magenta	O
,	O
and	O
this	O
camera	O
between	O
the	O
two	O
(	O
tested	O
using	O
DCS	O
Labs	O
-SW	O
-	O
CDM	O
28R	O
-	O
v15.2	O
A3	O
color	O
chart	O
)	O
and	O
with	O
individual	O
white	O
balancing	O
,	O
the	O
colors	O
are	O
very	O
similar	O
.	O
</s>
<s>
The	O
format	O
is	O
compressed	B-General_Concept
format	I-General_Concept
achieving	O
balanced	O
quality	O
and	O
file	O
size	O
.	O
</s>
<s>
Recording	O
in	O
color	O
depth	O
of	O
10-bits	O
and	O
4:2:2	O
chroma	O
subsampling	O
is	O
possible	O
with	O
Sony	O
's	O
XAVC	O
codec	B-General_Concept
.	O
</s>
<s>
All	O
Intra-frame	O
system	O
that	O
compresses	O
each	O
frame	O
individually	O
to	O
achieve	O
best	B-Device
quality	I-Device
.	O
</s>
<s>
When	O
recording	O
4K	B-Architecture
movies	I-Architecture
in	O
the	O
XAVC	O
HS	O
format	O
is	O
an	O
optional	O
which	O
is	O
using	O
a	O
HEVC	B-Algorithm
codec	I-Algorithm
(	O
H.265	B-Algorithm
)	O
and	O
has	O
high	B-General_Concept
compression	I-General_Concept
efficiency	O
.	O
</s>
<s>
Camera	O
can	O
record	O
in	O
"	O
Long	O
GOP	O
"	O
codec	B-General_Concept
(	O
H.264	B-Application
)	O
compression	O
which	O
is	O
compressing	O
multiple	O
frames	O
to	O
reduce	O
file	O
size	O
.	O
</s>
