<s>
The	O
Leica	B-Algorithm
L-Mount	I-Algorithm
is	O
a	O
bayonet	O
mount	O
developed	O
by	O
Leica	O
Camera	O
AG	O
for	O
interchangeable-lens	O
autofocus	O
digital	O
cameras	O
.	O
</s>
<s>
The	O
L-Mount	B-Algorithm
has	O
an	O
inner	O
diameter	O
of	O
51.6	O
mm	O
and	O
a	O
flange	O
depth	O
of	O
20.0	O
mm	O
.	O
</s>
<s>
The	O
L-mount	B-Algorithm
exists	O
in	O
two	O
versions	O
,	O
an	O
APS-C	O
version	O
(	O
TL	O
)	O
and	O
a	O
full-frame	O
version	O
(	O
SL	O
)	O
.	O
</s>
<s>
In	O
2018	O
Leica	O
formed	O
the	O
L-Mount	B-Algorithm
Alliance	I-Algorithm
,	O
licensing	O
Sigma	O
,	O
Panasonic	O
in	O
the	O
same	O
year	O
,	O
and	O
DJI	B-Device
in	O
2022	O
,	O
to	O
use	O
an	O
upgraded	O
version	O
of	O
the	O
mount	O
for	O
their	O
own	O
products	O
,	O
opening	O
the	O
way	O
for	O
a	O
more	O
extensive	O
system	O
of	O
fully	O
compatible	O
cameras	O
and	O
lenses	O
.	O
</s>
<s>
It	O
was	O
introduced	O
in	O
April	O
2014	O
with	O
the	O
Leica	B-Algorithm
T	I-Algorithm
(	O
Typ	O
701	O
)	O
camera	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
introduction	O
,	O
it	O
was	O
called	O
the	O
"	O
T-mount	O
"	O
,	O
but	O
this	O
was	O
changed	O
to	O
"	O
L-mount	B-Algorithm
"	O
with	O
the	O
release	O
of	O
the	O
Leica	B-Algorithm
SL	I-Algorithm
,	O
a	O
full-frame	O
sensor	O
camera	O
using	O
the	O
same	O
mount	O
.	O
</s>
<s>
The	O
Leica	B-Algorithm
T	I-Algorithm
was	O
renamed	O
to	O
the	O
Leica	B-Algorithm
TL	I-Algorithm
at	O
this	O
time	O
,	O
to	O
permit	O
marketing	O
clarity	O
for	O
the	O
L-mount	B-Algorithm
lens	O
line	O
:	O
TL	O
lenses	O
would	O
cover	O
APS-C	O
sensors	O
,	O
while	O
SL	O
lenses	O
would	O
cover	O
full-frame	O
sensors	O
.	O
</s>
<s>
The	O
mount	O
is	O
used	O
by	O
the	O
Leica	B-Algorithm
TL	I-Algorithm
(	O
discontinued	O
)	O
,	O
TL2	B-Algorithm
,	O
Leica	B-Algorithm
CL	I-Algorithm
(	O
2017	O
)	O
and	O
Leica	B-Algorithm
SL	I-Algorithm
systems	O
.	O
</s>
<s>
The	O
L-Mount	B-Algorithm
is	O
a	O
registered	O
trademark	O
of	O
Leica	O
Camera	O
AG	O
.	O
</s>
<s>
On	O
25	O
September	O
2018	O
,	O
the	O
L-Mount	B-Algorithm
Alliance	I-Algorithm
between	O
Leica	O
,	O
Panasonic	O
and	O
Sigma	O
was	O
announced	O
,	O
enabling	O
the	O
partners	O
"	O
to	O
make	O
use	O
of	O
the	O
L-Mount	B-Algorithm
standard	O
developed	O
by	O
Leica	O
for	O
their	O
own	O
developments	O
and	O
to	O
offer	O
both	O
cameras	O
and	O
lenses	O
utilising	O
this	O
lens	O
mount	O
"	O
with	O
full	O
compatibility	O
between	O
the	O
three	O
companies	O
 '	O
products	O
.	O
</s>
<s>
According	O
to	O
Sigma	O
CEO	O
,	O
Kazuto	O
Yamaki	O
,	O
the	O
"	O
L-mount	B-Algorithm
system	O
is	O
not	O
exactly	O
the	O
same	O
as	O
the	O
existing	O
one	O
.	O
</s>
<s>
On	O
the	O
same	O
day	O
,	O
Panasonic	O
announced	O
its	O
S1R	O
and	O
S1	O
full-frame	O
L-Mount	B-Algorithm
cameras	O
and	O
three	O
L-Mount	B-Algorithm
lenses	O
,	O
with	O
seven	O
more	O
lenses	O
to	O
be	O
launched	O
by	O
2020	O
.	O
</s>
<s>
Sigma	O
announced	O
that	O
it	O
will	O
launch	O
a	O
full-frame	O
camera	O
in	O
2019	O
,	O
using	O
the	O
L-Mount	B-Algorithm
and	O
the	O
company	O
's	O
Foveon	B-Algorithm
sensor	O
,	O
as	O
well	O
as	O
a	O
range	O
of	O
L-mount	B-Algorithm
lenses	O
and	O
adapters	O
for	O
Sigma	B-Algorithm
SA	I-Algorithm
and	O
Canon	B-Application
EF	I-Application
lenses	O
.	O
</s>
<s>
Six	O
cameras	O
and	O
39	O
native	O
lenses	O
are	O
confirmed	O
for	O
the	O
L-Mount	B-Algorithm
by	O
2020	O
.	O
</s>
<s>
Leica	B-Algorithm
SL	I-Algorithm
cameras	O
use	O
full-frame	O
sensors	O
.	O
</s>
<s>
Leica	O
has	O
an	O
existing	O
range	O
of	O
fifteen	O
L-Mount	B-Algorithm
lenses	O
.	O
</s>
<s>
Panasonic	O
committed	O
to	O
releasing	O
a	O
total	O
of	O
ten	O
lenses	O
for	O
the	O
L-mount	B-Algorithm
by	O
the	O
end	O
of	O
2020	O
,	O
beginning	O
with	O
the	O
50mm	O
F/1.4	O
prime	O
and	O
the	O
two	O
zooms	O
listed	O
below	O
;	O
stating	O
that	O
they	O
would	O
provide	O
details	O
at	O
Photokina	O
2019	O
.	O
</s>
<s>
14	O
primes	O
from	O
Sigma	O
's	O
'	O
Global	O
Vision	O
 '	O
range	O
,	O
primarily	O
designed	O
for	O
reflex	O
cameras	O
with	O
short	O
flange	O
depths	O
and	O
currently	O
available	O
for	O
the	O
mirrorless	O
Sony	B-Algorithm
E-mount	I-Algorithm
,	O
will	O
also	O
be	O
released	O
in	O
L-Mount	B-Algorithm
from	O
2019	O
.	O
</s>
<s>
Manual	O
third-party	O
lenses	O
are	O
being	O
produced	O
in	O
L-mount	B-Algorithm
by	O
Irix	O
Cine	O
,	O
7Artisans	O
(	O
Photoelectric	O
series	O
)	O
,	O
Meyer-Optik	O
(	O
Görlitz	O
series	O
)	O
,	O
and	O
Kipon	O
HandeVision	O
(	O
IBELUX	O
and	O
IBERIT	O
series	O
 '	O
)	O
.	O
</s>
<s>
Sigma	O
MC-21	O
EF-L	O
Sigma-manufactured	O
'	O
Global	O
Vision	O
 '	O
EF-mount	B-Application
lenses	O
are	O
fully	O
supported	O
and	O
compatible	O
;	O
although	O
non-Sigma	O
EF-mount	B-Application
lenses	O
remain	O
unguaranteed	O
.	O
</s>
