<s>
The	O
Leica	B-Algorithm
SL	I-Algorithm
(	O
Typ	O
601	O
)	O
is	O
a	O
full-frame	B-Device
mirrorless	I-Device
interchangeable-lens	I-Device
camera	I-Device
announced	O
by	O
Leica	O
Camera	O
AG	O
on	O
20	O
October	O
2015	O
.	O
</s>
<s>
Beside	O
the	O
Leica	O
S-System	O
,	O
the	O
Leica	B-Algorithm
SL-System	I-Algorithm
is	O
the	O
2nd	O
professional	O
camera	O
system	O
in	O
the	O
company	O
's	O
product	O
portfolio	O
.	O
</s>
<s>
The	O
SL	O
(	O
Typ	O
601	O
)	O
was	O
succeeded	O
by	O
the	O
Leica	B-Algorithm
SL2	I-Algorithm
in	O
2019	O
.	O
</s>
<s>
The	O
Leica	B-Algorithm
SL	I-Algorithm
(	O
Typ	O
601	O
)	O
introduced	O
the	O
first	O
EyeRes	O
Viewfinder	O
which	O
is	O
described	O
by	O
Leica	O
as	O
a	O
combination	O
of	O
optical	O
and	O
electronic	O
components	O
.	O
</s>
<s>
The	O
Leica	B-Algorithm
L-Mount	I-Algorithm
is	O
used	O
by	O
the	O
Leica	O
TL	O
,	O
CL	O
and	O
SL	O
Systems	O
.	O
</s>
<s>
It	O
was	O
introduced	O
by	O
the	O
Leica	B-Algorithm
T	I-Algorithm
(	O
Typ	O
701	O
)	O
in	O
April	O
2014	O
.	O
</s>
<s>
The	O
L-Mount	B-Algorithm
can	O
hold	O
lenses	O
made	O
for	O
APS-C	B-Algorithm
and	O
for	O
full	O
frame	O
sensor	O
formats	O
.	O
</s>
<s>
The	O
L-Mount	B-Algorithm
Alliance	I-Algorithm
,	O
announced	O
in	O
September	O
2018	O
,	O
opened	O
up	O
the	O
system	O
to	O
partners	O
Panasonic	O
and	O
Sigma	O
.	O
</s>
