<s>
The	O
Kodak	B-Algorithm
Retina	I-Algorithm
Reflex	I-Algorithm
is	O
a	O
discontinued	O
series	O
of	O
four	O
single-lens	B-Algorithm
reflex	I-Algorithm
cameras	I-Algorithm
made	O
by	O
Kodak	O
in	O
Germany	O
between	O
1957	O
and	O
1974	O
,	O
as	O
part	O
of	O
the	O
Kodak	B-Algorithm
Retina	I-Algorithm
line	O
of	O
35mm	O
film	O
cameras	O
.	O
</s>
<s>
The	O
earliest	O
Retina	B-Algorithm
Reflex	I-Algorithm
(	O
Type025	O
,	O
1957	O
)	O
uses	O
the	O
convertible	O
lens	O
system	O
introduced	O
with	O
the	O
Kodak	B-Algorithm
Retina	I-Algorithm
IIc/IIIc	O
in	O
1954	O
.	O
</s>
<s>
The	O
successor	O
cameras	O
,	O
starting	O
with	O
the	O
Retina	B-Algorithm
Reflex	I-Algorithm
S	O
(	O
Type034	O
,	O
1959	O
)	O
,	O
use	O
DKL-mount	O
lenses	O
,	O
introduced	O
with	O
the	O
Retina	O
IIIS	O
of	O
1958	O
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
brand	O
was	O
discontinued	O
in	O
1966	O
,	O
then	O
revived	O
as	O
the	O
Instamatic	B-Algorithm
Reflex	O
in	O
1968	O
,	O
using	O
the	O
same	O
DKL-mount	O
lenses	O
with	O
the	O
easy-loading	O
Kodapak	O
line	O
of	O
126	O
film	O
cartridges	O
.	O
</s>
<s>
The	O
Instamatic	B-Algorithm
Reflex	O
was	O
discontinued	O
in	O
1974	O
.	O
</s>
<s>
The	O
Kodak	O
Type	O
025	O
Retina	B-Algorithm
Reflex	I-Algorithm
is	O
an	O
SLR	B-Algorithm
camera	I-Algorithm
that	O
uses	O
convertible	O
lenses	O
(	O
German	O
:	O
Wechselobjektiv	O
)	O
,	O
made	O
by	O
Kodak	O
AG	O
Stuttgart	O
,	O
Germany	O
.	O
</s>
<s>
Like	O
many	O
35mm	O
SLR	B-Algorithm
cameras	I-Algorithm
of	O
West	O
German	O
heritage	O
it	O
is	O
equipped	O
with	O
a	O
leaf	O
shutter	O
instead	O
of	O
a	O
focal	O
plane	O
shutter	O
.	O
</s>
<s>
It	O
was	O
named	O
Type	O
025	O
Retina	B-Algorithm
Reflex	I-Algorithm
since	O
it	O
inherited	O
several	O
features	O
from	O
the	O
contemporary	O
Retina	O
rangefinder	O
cameras	O
,	O
like	O
the	O
Retina	O
IIIc	O
:	O
The	O
film	O
advance	O
and	O
exposure	O
counting	O
system	O
,	O
the	O
film	O
channel	O
,	O
the	O
selenium	O
meter	O
,	O
and	O
the	O
focusing	O
mechanics	O
of	O
the	O
lenses	O
.	O
</s>
<s>
The	O
convertible	O
lenses	O
of	O
early	O
Retina	B-Algorithm
reflex	I-Algorithm
models	O
are	O
equipped	O
with	O
interchangeable	O
front	O
elements	O
and	O
a	O
fixed	O
set	O
of	O
elements	O
that	O
remain	O
on	O
the	O
body	O
.	O
</s>
<s>
A	O
similar	O
system	O
was	O
introduced	O
in	O
1953	O
with	O
the	O
Contaflex	B-Algorithm
(	O
SLR	B-Algorithm
)	O
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
is	O
,	O
on	O
rare	O
occasions	O
,	O
found	O
with	O
very	O
similar	O
lenses	O
made	O
by	O
Rodenstock	O
.	O
</s>
<s>
The	O
camera	O
's	O
top	O
plate	O
has	O
the	O
manually	O
set	O
frame	O
counter	O
,	O
the	O
shutter	O
release	O
,	O
the	O
film	O
rewind	O
knob	O
with	O
film	O
reminder	O
dial	O
,	O
the	O
exposure	O
needle	O
window	O
,	O
meter	O
adjustment	O
knob	O
with	O
EV	O
and	O
ASA/DIN	O
scales	O
,	O
the	O
film	O
(	O
advance	O
)	O
release	O
button	O
,	O
the	O
frame	O
(	O
counter	O
)	O
advance	O
slider	O
,	O
and	O
the	O
accessory	B-Algorithm
shoe	I-Algorithm
.	O
</s>
<s>
In	O
use	O
,	O
the	O
Retina	B-Algorithm
Reflex	I-Algorithm
frame	O
counter	O
works	O
down	O
from	O
35	O
(	O
or	O
20	O
)	O
to	O
0	O
,	O
at	O
which	O
point	O
the	O
film	O
advance	O
locks	O
.	O
</s>
<s>
All	O
the	O
Retina	B-Algorithm
Reflex	I-Algorithm
cameras	O
are	O
remarkably	O
complex	O
instruments	O
and	O
quite	O
heavy	O
for	O
their	O
size	O
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
originally	O
sold	O
in	O
1958	O
for	O
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
was	O
equipped	O
with	O
either	O
a	O
Schneider-Kreuznach	O
Retina-Xenon	O
or	O
a	O
Rodenstock	O
Retina-Heligon	O
,	O
both	O
.	O
</s>
<s>
In	O
the	O
Retina	O
convertible	O
lens	O
system	O
,	O
which	O
is	O
used	O
with	O
the	O
Retina	B-Algorithm
Reflex	I-Algorithm
and	O
earlier	O
Retina	O
IIc	O
,	O
IIC	O
,	O
IIIc	O
,	O
and	O
IIIC	O
rangefinder	O
cameras	O
,	O
the	O
same	O
set	O
of	O
three	O
permanently-fixed	O
rear	O
elements	O
are	O
shared	O
with	O
the	O
standard	O
lens	O
and	O
the	O
user	O
exchanges	O
the	O
front	O
set	O
of	O
lens	O
elements	O
to	O
modify	O
the	O
focal	O
length	O
.	O
</s>
<s>
For	O
the	O
Retina	B-Algorithm
Reflex	I-Algorithm
,	O
the	O
wide-angle	O
35mm	O
unit	O
could	O
be	O
fitted	O
,	O
but	O
this	O
combination	O
was	O
not	O
recommended	O
as	O
the	O
resulting	O
image	O
on	O
the	O
ground	O
glass	O
screen	O
would	O
be	O
dim	O
and	O
hard	O
to	O
focus	O
.	O
</s>
<s>
Introduced	O
in	O
1959	O
,	O
the	O
Type	O
034	O
Retina	B-Algorithm
Reflex	I-Algorithm
S	O
was	O
a	O
major	O
redesign	O
of	O
the	O
original	O
Retina	B-Algorithm
Reflex	I-Algorithm
.	O
</s>
<s>
The	O
major	O
difference	O
is	O
its	O
use	O
of	O
fully	O
interchangeable	O
lenses	O
,	O
the	O
same	O
lenses	O
that	O
were	O
made	O
for	O
the	O
Kodak	B-Algorithm
Retina	I-Algorithm
IIIS	I-Algorithm
rangefinder	O
camera	O
.	O
</s>
<s>
It	O
was	O
also	O
used	O
in	O
the	O
later	O
Retina	B-Algorithm
Reflex	I-Algorithm
III	O
,	O
Retina	B-Algorithm
Reflex	I-Algorithm
IV	O
,	O
and	O
the	O
Kodak	B-Algorithm
Instamatic	I-Algorithm
Reflex	I-Algorithm
.	O
</s>
<s>
As	O
for	O
the	O
original	O
Retina	B-Algorithm
Reflex	I-Algorithm
,	O
lenses	O
were	O
available	O
from	O
both	O
Schneider	O
and	O
Rodenstock	O
,	O
but	O
this	O
time	O
the	O
lenses	O
had	O
identical	O
bayonet	O
mounts	O
.	O
</s>
<s>
The	O
aperture	O
is	O
now	O
in	O
the	O
interchangeable	O
lenses	O
,	O
which	O
eliminates	O
the	O
problem	O
of	O
setting	O
the	O
wrong	O
aperture	O
on	O
the	O
original	O
Retina	B-Algorithm
Reflex	I-Algorithm
.	O
</s>
<s>
The	O
top	O
plate	O
,	O
bottom	O
plate	O
,	O
and	O
camera	O
body	O
are	O
otherwise	O
nearly	O
identical	O
to	O
the	O
Retina	B-Algorithm
Reflex	I-Algorithm
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
S	O
originally	O
sold	O
in	O
1959	O
for	O
.	O
</s>
<s>
A	O
later	O
variant	O
is	O
the	O
Type	O
041	O
Retina	B-Algorithm
Reflex	I-Algorithm
III	O
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
cases	O
were	O
already	O
something	O
special	O
before	O
since	O
the	O
film	O
advance	O
lever	O
(	O
Reflex	O
)	O
and	O
aperture/shutter	O
setting	O
wheel	O
(	O
Reflex	O
S	O
)	O
are	O
located	O
on	O
the	O
bottom	O
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
III	O
originally	O
sold	O
in	O
1961	O
for	O
.	O
</s>
<s>
The	O
Type	O
051	O
Retina	B-Algorithm
Reflex	I-Algorithm
IV	O
was	O
made	O
from	O
1964	O
to	O
1967	O
.	O
</s>
<s>
The	O
accessory	B-Algorithm
shoe	I-Algorithm
now	O
had	O
flash	O
contacts	O
.	O
</s>
<s>
The	O
Retina	B-Algorithm
Reflex	I-Algorithm
IV	O
originally	O
sold	O
in	O
1964	O
for	O
.	O
</s>
<s>
The	O
shutter	O
speeds	O
on	O
the	O
Instamatic	B-Algorithm
Reflex	O
,	O
billed	O
as	O
the	O
camera	O
which	O
"	O
does	O
simply	O
everything	O
,	O
and	O
everything	O
simply	O
"	O
,	O
range	O
from	O
to	O
20seconds	O
,	O
with	O
flashcube	O
sync	O
at	O
and	O
with	O
an	O
electronic	O
flash	O
.	O
</s>
<s>
The	O
Instamatic	B-Algorithm
Reflex	O
was	O
sold	O
from	O
1968	O
until	O
1974	O
;	O
when	O
it	O
was	O
introduced	O
,	O
the	O
list	O
price	O
ranged	O
from	O
for	O
the	O
body	O
only	O
,	O
finished	O
in	O
black	O
,	O
to	O
with	O
the	O
1.9	O
lens	O
.	O
</s>
<s>
+	O
DKL-mount	O
lenses	O
for	O
Retina	B-Algorithm
Reflex	I-Algorithm
S	O
,	O
III	O
,	O
IV	O
,	O
Instamatic	B-Algorithm
Reflex	O
and	O
Retina	O
IIIS	O
Focal	O
length	O
Aperture	O
Manufacturer	O
Name	O
Construction	O
Min	O
.	O
</s>
