<s>
The	O
Minolta	B-Algorithm
SR-2	I-Algorithm
was	O
presented	O
in	O
1958	O
as	O
the	O
first	O
35mm	O
SLR	B-Algorithm
camera	I-Algorithm
from	O
Chiyoda	O
Kogaku	O
.	O
</s>
<s>
Popular	O
cameras	O
of	O
this	O
type	O
at	O
that	O
time	O
were	O
mainly	O
from	O
Europe	O
but	O
a	O
few	O
from	O
Japan	O
,	O
including	O
the	O
Asahi	B-Application
Pentax	I-Application
,	O
the	O
Miranda	B-Algorithm
T	I-Algorithm
and	O
the	O
Topcon	B-Algorithm
R	I-Algorithm
.	O
The	O
miniature	O
SLR	B-Algorithm
camera	I-Algorithm
concept	O
was	O
conceived	O
in	O
the	O
1930s	O
at	O
Ihagee	O
in	O
Dresden	O
,	O
resulting	O
in	O
the	O
1936	O
Kine	B-Algorithm
Exakta	I-Algorithm
.	O
</s>
<s>
Influential	O
cameras	O
designs	O
like	O
that	O
of	O
the	O
1939	O
KW	O
Praktiflex	B-Algorithm
,	O
the	O
1949	O
ZI	O
Contax	O
S	O
,	O
and	O
1952	O
the	O
KW	O
Praktina	O
marked	O
the	O
steady	O
progress	O
toward	O
a	O
perfected	O
SLR	B-Algorithm
.	O
</s>
<s>
In	O
1947	O
,	O
the	O
Minolta-35	B-Algorithm
was	O
launched	O
as	O
the	O
company	O
's	O
first	O
35mm	O
camera	O
,	O
resulting	O
in	O
a	O
brief	O
range	O
of	O
quite	O
popular	O
rangefinder	B-Algorithm
models	I-Algorithm
lasting	O
until	O
the	O
end	O
of	O
the	O
1950s	O
.	O
</s>
<s>
The	O
Minolta	B-Algorithm
SR-2	I-Algorithm
is	O
well	O
built	O
and	O
thoroughly	O
constructed	O
;	O
including	O
features	O
that	O
remained	O
characteristic	O
of	O
the	O
Minolta	O
SLR	B-Algorithm
camera	I-Algorithm
range	O
to	O
follow	O
until	O
the	O
advent	O
of	O
the	O
auto	O
focus	O
cameras	O
in	O
the	O
1980s	O
.	O
</s>
<s>
The	O
main	O
features	O
are	O
a	O
single	O
stroke	O
wind-on	O
lever	O
;	O
an	O
instant	B-Algorithm
return	I-Algorithm
mirror	I-Algorithm
and	O
a	O
sturdy	O
three-pronged	O
bayonet	O
lens	B-Algorithm
mount	I-Algorithm
with	O
an	O
internal	O
automatic	O
aperture	B-General_Concept
stop-down	O
mechanism	O
.	O
</s>
<s>
This	O
mount	O
is	O
the	O
earliest	O
example	O
of	O
a	O
modern	O
35mm	O
SLR	B-Algorithm
bayonet	O
lens	B-Algorithm
mount	I-Algorithm
,	O
used	O
throughout	O
the	O
entire	O
lifespan	O
of	O
the	O
Minolta	O
manual	O
focus	O
camera	O
area	O
.	O
</s>
<s>
The	O
automatic	O
aperture	B-General_Concept
mechanism	O
on	O
this	O
camera	O
does	O
not	O
reopen	O
the	O
aperture	B-General_Concept
after	O
exposure	O
,	O
a	O
feature	O
at	O
the	O
time	O
regarded	O
as	O
unnecessary	O
,	O
since	O
the	O
darkened	O
finder	O
might	O
indicate	O
the	O
camera	O
not	O
being	O
made	O
ready	O
for	O
the	O
next	O
exposure	O
.	O
</s>
<s>
Reflex	B-Algorithm
finder	I-Algorithm
mirror	O
flips	O
up	O
and	O
returns	O
instantly	O
after	O
exposure	O
.	O
</s>
<s>
45mm	O
wide	O
throated	O
three-pronged	O
bayonet	O
lens	B-Algorithm
mount	I-Algorithm
.	O
</s>
<s>
Lens	O
diaphragm	O
closes	O
automatically	O
to	O
the	O
preset	O
aperture	B-General_Concept
and	O
opens	O
on	O
winding	O
on	O
.	O
</s>
<s>
Secondary	O
yellow	O
LV	O
(	O
Light	O
value	O
)	O
numerals	O
engraved	O
on	O
the	O
aperture	B-General_Concept
ring	O
and	O
the	O
shutter	O
speed	O
dial	O
;	O
the	O
sum	O
of	O
the	O
set	O
pair	O
of	O
values	O
ads	O
up	O
to	O
the	O
required	O
LV	O
number	O
.	O
</s>
