<s>
The	O
Leica	B-Algorithm
M7	I-Algorithm
is	O
a	O
35	O
mm	O
rangefinder	B-Algorithm
camera	I-Algorithm
introduced	O
by	O
Leica	O
AG	O
in	O
2002	O
as	O
a	O
direct	O
successor	O
to	O
the	O
M6	B-Algorithm
.	O
</s>
<s>
The	O
electronic	O
Leica	B-Algorithm
M7	I-Algorithm
is	O
a	O
departure	O
from	O
previous	O
mechanical	O
designs	O
for	O
the	O
M	O
series	O
.	O
</s>
<s>
Unlike	O
the	O
M6	B-Algorithm
TTL	I-Algorithm
whose	O
"	O
off	O
"	O
position	O
only	O
disables	O
the	O
meter	O
,	O
the	O
M7	O
features	O
a	O
switch	O
on	O
the	O
shutter	O
release	O
,	O
which	O
prevents	O
both	O
metering	O
and	O
the	O
shutter	O
from	O
firing	O
.	O
</s>
<s>
The	O
M7	O
is	O
also	O
the	O
first	O
Leica	B-Algorithm
M	I-Algorithm
series	I-Algorithm
to	O
support	O
film	O
DX	O
encoding	O
and	O
exposure	O
compensation	O
using	O
the	O
dial	O
that	O
has	O
been	O
on	O
the	O
back	O
of	O
Leica	O
cameras	O
since	O
the	O
M3	B-Algorithm
.	O
</s>
<s>
Originally	O
used	O
simply	O
as	O
a	O
reminder	O
of	O
the	O
sensitivity	O
of	O
the	O
film	O
,	O
and	O
then	O
as	O
film	O
speed	O
setting	O
coupled	O
to	O
the	O
light	O
meter	O
starting	O
with	O
the	O
M6	B-Algorithm
,	O
the	O
dial	O
now	O
controls	O
exposure	O
compensation	O
on	O
the	O
M7	O
.	O
</s>
