<s>
The	O
Nikon	B-Algorithm
Df	I-Algorithm
is	O
a	O
full-frame	B-Algorithm
F-mount	B-Architecture
DSLR	B-Device
FX	B-Algorithm
format	I-Algorithm
camera	O
announced	O
by	O
Nikon	B-Algorithm
on	O
November	O
5	O
,	O
2013	O
.	O
</s>
<s>
It	O
uses	O
dedicated	O
mechanical	O
controls	O
similar	O
to	O
those	O
used	O
on	O
mechanical	O
35mm	O
film	O
SLR	B-Algorithm
camera	I-Algorithm
and	O
has	O
an	O
appearance	O
similar	O
to	O
the	O
Nikon	B-Algorithm
FE	I-Algorithm
and	O
Nikon	B-Algorithm
FM	I-Algorithm
film	O
cameras	O
.	O
</s>
<s>
Nikon	B-Algorithm
's	O
website	O
states	O
"	O
Using	O
its	O
large	O
,	O
metallic	O
mechanical	O
dials	O
,	O
photographers	O
will	O
rediscover	O
a	O
more	O
direct	O
connection	O
with	O
their	O
camera.	O
"	O
</s>
<s>
It	O
has	O
the	O
same	O
sensor	O
overall	O
score	O
89	O
of	O
DxOMark	B-Algorithm
with	O
Nikon	B-Algorithm
D4	I-Algorithm
,	O
the	O
Nikon	B-Algorithm
Df	I-Algorithm
(	O
at	O
time	O
of	O
release	O
)	O
ranked	O
first	O
in	O
a	O
low-light	O
test	O
with	O
3279	O
ISO	O
(	O
Nikon	B-Algorithm
D4	I-Algorithm
with	O
2965	O
ISO	O
)	O
,	O
but	O
in	O
practice	O
the	O
difference	O
is	O
small	O
.	O
</s>
<s>
In	O
a	O
departure	O
from	O
the	O
rest	O
of	O
Nikon	B-Algorithm
's	O
DSLR	B-Device
lineup	O
,	O
the	O
Df	O
does	O
not	O
record	O
video	O
,	O
only	O
still	O
images	O
;	O
while	O
most	O
reviews	O
were	O
generally	O
positive	O
,	O
this	O
and	O
other	O
built-in	O
limitations	O
of	O
the	O
camera	O
were	O
seen	O
as	O
negatives	O
.	O
</s>
<s>
Also	O
notable	O
by	O
their	O
absence	O
were	O
built-in	O
flash	O
and	O
a	O
variety	O
of	O
automatic	O
modes	O
,	O
though	O
the	O
backward	O
lens	O
compatibility	O
extends	O
to	O
nearly	O
the	O
entirety	O
of	O
the	O
Nikon	B-Algorithm
lineup	O
since	O
1959	O
.	O
</s>
<s>
Unlike	O
other	O
modern	O
F-mount	B-Architecture
cameras	O
,	O
the	O
Nikon	B-Algorithm
Df	I-Algorithm
has	O
an	O
adjustable	O
meter	O
coupling	O
lever	O
,	O
that	O
allows	O
for	O
mounting	O
of	O
early	O
F-mount	B-Architecture
manual-focus	O
lenses	O
,	O
such	O
as	O
Non-AI	O
and	O
AI	O
lenses	O
,	O
without	O
damage	O
.	O
</s>
