<s>
Rolleiflex	B-Algorithm
is	O
the	O
name	O
of	O
a	O
long-running	O
and	O
diverse	O
line	O
of	O
high-end	O
cameras	O
originally	O
made	O
by	O
the	O
German	O
company	O
Franke	O
&	O
Heidecke	O
,	O
and	O
later	O
Rollei-Werke	O
.	O
</s>
<s>
The	O
"	O
Rolleiflex	B-Algorithm
"	O
name	O
is	O
most	O
commonly	O
used	O
to	O
refer	O
to	O
Rollei	O
's	O
premier	O
line	O
of	O
medium	O
format	O
twin	B-Algorithm
lens	I-Algorithm
reflex	I-Algorithm
(	O
TLR	O
)	O
cameras	O
.	O
</s>
<s>
(	O
A	O
companion	O
line	O
intended	O
for	O
amateur	O
photographers	O
,	O
Rolleicord	B-Algorithm
,	O
existed	O
for	O
several	O
decades	O
.	O
)	O
</s>
<s>
However	O
,	O
a	O
variety	O
of	O
TLRs	O
and	O
SLRs	B-Algorithm
in	O
medium	O
format	O
,	O
and	O
zone	O
focus	O
,	O
and	O
SLR	B-Algorithm
35	O
mm	O
,	O
as	O
well	O
as	O
digital	B-Application
formats	O
have	O
also	O
been	O
produced	O
under	O
the	O
Rolleiflex	B-Algorithm
label	O
.	O
</s>
<s>
The	O
120	O
roll	O
film	O
Rolleiflex	B-Algorithm
series	O
is	O
marketed	O
primarily	O
to	O
professional	O
photographers	O
.	O
</s>
<s>
Rolleiflex	B-Algorithm
cameras	O
have	O
used	O
film	O
formats	O
117	O
(	O
Original	O
Rolleiflex	B-Algorithm
)	O
,	O
120	O
(	O
Standard	O
,	O
Automat	O
,	O
Letter	O
Models	O
,	O
Rollei-Magic	O
,	O
and	O
T	O
model	O
)	O
,	O
and	O
127	O
(	O
Baby	O
Rolleiflex	B-Algorithm
)	O
.	O
</s>
<s>
The	O
Rolleiflex	B-Algorithm
TLR	O
film	O
cameras	O
were	O
known	O
for	O
their	O
exceptional	O
build	O
quality	O
,	O
compact	O
size	O
,	O
modest	O
weight	O
,	O
superior	O
optics	O
,	O
durability	O
,	O
simplicity	O
,	O
reliable	O
mechanics	O
and	O
bright	O
viewfinders	O
.	O
</s>
<s>
Unique	O
to	O
the	O
Rolleiflex	B-Algorithm
Automat	O
and	O
letter	O
model	O
cameras	O
,	O
the	O
mechanical	O
wind	O
mechanism	O
was	O
robust	O
and	O
clever	O
,	O
making	O
film	O
loading	O
semi-automatic	O
and	O
quick	O
.	O
</s>
<s>
This	O
makes	O
the	O
Rolleiflex	B-Algorithm
Automat/Letter	O
model	O
cameras	O
very	O
sought-after	O
for	O
shooting	O
fast-paced	O
action	O
,	O
such	O
as	O
street	O
photography	O
.	O
</s>
<s>
Some	O
,	O
professional	O
,	O
amateur	O
and	O
fine-art	O
photographers	O
still	O
shoot	O
Rolleiflex	B-Algorithm
TLR	O
film	O
cameras	O
with	O
color	O
transparency	O
,	O
color	O
negative	O
,	O
or	O
black-and-white	O
film	O
.	O
</s>
<s>
Historically	O
there	O
were	O
five	O
focal	O
length	O
cameras	O
available	O
including	O
5.5cm	O
Rollei-Wide	O
,	O
6.0cm	O
Baby	O
Rollei	O
,	O
7.5cm	O
(	O
f:3.5	O
)	O
,	O
8.0cm	O
(	O
f2.8	O
)	O
,	O
and	O
13.5cm	O
(	O
f:4	O
Zeiss	O
Sonnar	O
)	O
Tele-Rolleiflex	O
.	O
</s>
<s>
Although	O
all	O
Rolleflex	O
cameras	O
can	O
be	O
fine	O
user	O
cameras	O
,	O
there	O
is	O
also	O
an	O
active	O
market	O
for	O
many	O
Rolleiflex	B-Algorithm
models	O
as	O
collectables	O
,	O
and	O
this	O
adds	O
(	O
greatly	O
in	O
some	O
models	O
)	O
to	O
the	O
end	O
price	O
paid	O
,	O
particularly	O
in	O
Japan	O
.	O
</s>
<s>
Rolleiflex	B-Algorithm
medium	O
format	O
cameras	O
continued	O
to	O
be	O
produced	O
by	O
DHW	O
Fototechnik	O
up	O
to	O
2014	O
—	O
a	O
company	O
founded	O
by	O
former	O
Franke	O
&	O
Heidecke	O
employees	O
.	O
</s>
<s>
DHW	O
Fototechnik	O
announced	O
two	O
new	O
Rolleiflex	B-Algorithm
cameras	O
and	O
a	O
new	O
electronic	O
shutter	O
for	O
photokina	O
2012	O
.	O
</s>
<s>
DW	O
Photo	O
focuses	O
on	O
producing	O
the	O
Rolleiflex	B-Algorithm
Hy6	O
mod2	O
medium	O
format	O
SLR	B-Algorithm
camera	I-Algorithm
(	O
digital	B-Application
&	O
film	O
)	O
,	O
servicing	O
existing	O
cameras	O
,	O
including	O
providing	O
firmware	O
and	O
hardware	O
upgrades	O
.	O
</s>
<s>
This	O
first	O
Rolleiflex	B-Algorithm
was	O
introduced	O
in	O
1929	O
after	O
three	O
years	O
of	O
development	O
,	O
and	O
was	O
the	O
company	O
's	O
first	O
medium	O
format	O
roll-film	O
camera	O
,	O
which	O
was	O
used	O
with	O
unpopular	O
117	O
(	O
B1	O
)	O
film	O
.	O
</s>
<s>
It	O
was	O
a	O
Twin-Lens	B-Algorithm
Reflex	I-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
The	O
first	O
Rolleiflex	B-Algorithm
to	O
offer	O
a	O
Schneider	O
Kreuznach	O
Xenar	O
taking	O
lens	O
as	O
an	O
option	O
,	O
in	O
addition	O
to	O
the	O
Carl	O
Zeiss	O
Tessar	O
.	O
</s>
<s>
Incorporated	O
the	O
first	O
8cm	O
f2.8	O
taking	O
lens	O
(	O
either	O
an	O
80mm	O
Carl	O
Zeiss	O
Tessar	O
or	O
Opton	O
Tessar	O
)	O
into	O
the	O
Rolleiflex	B-Algorithm
line	O
.	O
</s>
<s>
The	O
new	O
Wide	O
Rolleiflex	B-Algorithm
uses	O
a	O
50mm/f4	O
Schneider	O
Super-Angulon	O
taking	O
lens	O
.	O
</s>
<s>
Rollei	O
's	O
first	O
medium-format	O
SLR	B-Algorithm
,	O
introduced	O
in	O
1966	O
.	O
</s>
<s>
A	O
35mm	O
SLR	B-Algorithm
introduced	O
in	O
1970	O
.	O
</s>
<s>
There	O
are	O
two	O
models	O
of	O
miniature	O
Rolleiflex	B-Algorithm
cameras	O
.	O
</s>
<s>
These	O
are	O
not	O
true	O
Rolleiflex	B-Algorithm
cameras	O
but	O
are	O
miniature	O
reproductions	O
of	O
the	O
Rolleiflex	B-Algorithm
TLR	O
design	O
produced	O
under	O
licence	O
by	O
the	O
German	O
camera	O
manufacturer	O
Minox	O
.	O
</s>
<s>
One	O
model	O
is	O
a	O
miniature	O
digital	B-Application
camera	O
,	O
the	O
other	O
is	O
a	O
miniature	O
Rolleiflex	B-Algorithm
TLR	O
film	O
camera	O
.	O
</s>
<s>
The	O
original	O
model	O
,	O
now	O
discontinued	O
,	O
was	O
the	O
Rolleiflex	B-Algorithm
MiniDigi	O
,	O
a	O
miniature	O
reproduction	O
of	O
the	O
TLR	O
Rolleiflex	B-Algorithm
.	O
</s>
<s>
As	O
the	O
name	O
implies	O
,	O
the	O
camera	O
was	O
a	O
digital	B-Application
reproduction	O
,	O
with	O
the	O
"	O
viewing	O
"	O
lens	O
being	O
a	O
dummy	O
.	O
</s>
<s>
This	O
was	O
superseded	O
by	O
the	O
MINOX	O
DCC	O
(	O
Digital	B-Application
Classic	O
Camera	O
)	O
Rolleiflex	B-Algorithm
AF	O
5.0	O
.	O
</s>
<s>
The	O
CMOS	O
sensor	O
has	O
been	O
upgraded	O
to	O
3	O
megapixels	O
,	O
with	O
5.0	O
megapixels	O
available	O
by	O
interpolation	B-Algorithm
.	O
</s>
<s>
The	O
taking	O
lens	O
is	O
a	O
4.9mm	O
f/2.8	O
;	O
the	O
camera	O
has	O
digital	B-Application
autofocus	O
.	O
</s>
<s>
There	O
was	O
also	O
a	O
1/3	O
scale	O
miniature	O
Rolleiflex	B-Algorithm
TLR	O
,	O
using	O
Minox	O
film	O
,	O
producing	O
36	O
exposures	O
of	O
8x11mm	O
format	O
negative	O
.	O
</s>
<s>
Rolleiflex	B-Algorithm
T	O
:	O
1958	O
–	O
75	O
(	O
no	O
Automat	O
film	O
transport	O
and	O
with	O
f:3.5	O
Tessar	O
lens	O
only	O
.	O
</s>
<s>
Rolleiflex	B-Algorithm
4×4	O
:	O
1931	O
–	O
38	O
Baby	O
Rolleiflex	B-Algorithm
(	O
1930s	O
)	O
(	O
6	O
cm	O
f:3.5	O
or	O
2.8	O
Tessar	O
lens	O
)	O
Two	O
models	O
,	O
with	O
rim	O
set	O
shutter	O
and	O
f	O
.	O
Deckel	O
made	O
diaphragm	O
control	O
,	O
or	O
with	O
Rollei	O
made	O
levers	O
on	O
the	O
shutter	O
and	O
a	O
small	O
shutter	O
speed	O
,	O
f-number	O
indicator	O
window	O
above	O
the	O
viewing	O
lens	O
.	O
</s>
<s>
So	O
in	O
the	O
first	O
model	O
of	O
Pre-War	O
Baby	O
Rolleiflex	B-Algorithm
there	O
are	O
actually	O
four	O
different	O
cameras	O
.	O
</s>
<s>
Rolleiflex	B-Algorithm
4×4	O
:	O
1938	O
–	O
41	O
Sports	O
Baby	O
Rolleiflex	B-Algorithm
(	O
6	O
cm	O
f:2.8	O
Tessar	O
Only	O
)	O
New	O
fast	O
focus	O
with	O
larger	O
knob	O
,	O
front	O
cover	O
like	O
a	O
Rolleicord	B-Algorithm
II	O
,	O
with	O
early	O
cameras	O
having	O
only	O
one	O
bayonet	O
,	O
and	O
later	O
cameras	O
with	O
two	O
.	O
</s>
<s>
Rolleiflex	B-Algorithm
4×4	O
Black	O
:	O
1963	O
–	O
69	O
(	O
rare	O
)	O
By	O
serial	O
numbers	O
9,120	O
were	O
made	O
.	O
</s>
<s>
Rollei	O
responded	O
with	O
two	O
models	O
to	O
the	O
introduction	O
of	O
the	O
Mamiya	O
line	O
of	O
interchangeable	O
lenses	O
TLR	B-Algorithm
cameras	I-Algorithm
,	O
the	O
Tele	O
Rolleiflex	B-Algorithm
with	O
135	O
mm	O
lenses	O
,	O
and	O
the	O
Rollei	O
Wide	O
with	O
55	O
mm	O
.	O
</s>
<s>
Wide	O
Rolleiflex	B-Algorithm
4.0	O
FW	O
(	O
Schneider	O
Angulon	O
)	O
—	O
classic	O
reissue	O
.	O
</s>
<s>
Tele	O
Rolleiflex	B-Algorithm
4.0	O
FT	O
(	O
Tele-Xenar	O
)	O
—	O
classic	O
reissue	O
.	O
</s>
