<s>
The	O
Konica	B-Algorithm
F	I-Algorithm
was	O
the	O
first	O
35mm	O
SLR	B-Algorithm
camera	I-Algorithm
produced	O
by	O
Konishiroku	O
,	O
released	O
in	O
February	O
1960	O
.	O
</s>
<s>
Between	O
600	O
and	O
1500	O
total	O
Konica	B-Algorithm
Fs	I-Algorithm
were	O
produced	O
,	O
making	O
it	O
a	O
highly	O
sought-after	O
camera	O
.	O
</s>
<s>
A	O
year	O
prior	O
to	O
the	O
Konica	B-Algorithm
F	I-Algorithm
's	O
introduction	O
,	O
a	O
prototype	O
of	O
that	O
camera	O
was	O
displayed	O
at	O
a	O
photo	O
show	O
in	O
Japan	O
.	O
</s>
<s>
The	O
only	O
difference	O
between	O
the	O
two	O
was	O
the	O
mounting	O
of	O
the	O
selenium	O
light	O
meter	O
:	O
While	O
the	O
Konica	B-Algorithm
F	I-Algorithm
meter	O
was	O
built	O
into	O
the	O
front	O
of	O
the	O
prism	O
housing	O
,	O
that	O
of	O
the	O
KonicaFlex	O
was	O
a	O
flip-up	O
type	O
meter	O
carried	O
over	O
from	O
the	O
Konica	O
IIIM	O
rangefinder	O
of	O
1957	O
.	O
</s>
<s>
The	O
Konica	B-Algorithm
F	I-Algorithm
used	O
a	O
new	O
design	O
of	O
Konishiroku-made	O
shutter	O
called	O
the	O
Hi	O
Synchro	O
(	O
also	O
High	O
Synchro	O
)	O
,	O
the	O
predecessor	O
to	O
the	O
Copal	O
Square	O
shutter	O
(	O
descendants	O
of	O
which	O
are	O
almost	O
universally	O
used	O
in	O
film	O
and	O
digital	B-Device
SLRs	I-Device
in	O
the	O
21st	O
century	O
)	O
.	O
</s>
<s>
Although	O
not	O
a	O
Copal	O
shutter	O
,	O
the	O
new	O
technology	O
was	O
showcased	O
in	O
the	O
Konica	B-Algorithm
F	I-Algorithm
.	O
Contemporary	O
cameras	O
(	O
and	O
many	O
later	O
ones	O
)	O
were	O
using	O
horizontal	O
running	O
,	O
cloth	O
shutters	O
and	O
older	O
designs	O
that	O
were	O
less	O
durable	O
.	O
</s>
<s>
This	O
was	O
the	O
highest	O
shutter	O
speed	O
attained	O
to	O
date	O
in	O
a	O
35mm	O
SLR	B-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
No	O
subsequent	O
Konica	O
35mm	O
SLR	B-Algorithm
camera	I-Algorithm
ever	O
featured	O
faster	O
than	O
1/1000	O
shutter	O
speed	O
.	O
</s>
<s>
The	O
Konica	B-Algorithm
F	I-Algorithm
also	O
featured	O
a	O
1/125	O
flash	O
sync	O
,	O
whereas	O
other	O
cameras	O
of	O
the	O
time	O
offered	O
1/30	O
to	O
1/60	O
sync	O
.	O
</s>
<s>
The	O
small	O
number	O
of	O
Konica	B-Algorithm
Fs	I-Algorithm
on	O
store	O
shelves	O
resulted	O
in	O
the	O
model	O
being	O
largely	O
unnoticed	O
,	O
with	O
the	O
Canonflex	O
R2000	O
considered	O
by	O
many	O
to	O
be	O
the	O
first	O
35mm	O
SLR	B-Algorithm
to	O
achieve	O
1/2000	O
shutter	O
speed	O
,	O
despite	O
the	O
Konica	B-Algorithm
F	I-Algorithm
preceding	O
it	O
by	O
eight	O
months	O
.	O
</s>
<s>
The	O
35	O
,	O
52	O
and	O
85mm	O
all	O
had	O
a	O
linkage	O
that	O
juts	O
out	O
from	O
the	O
side	O
of	O
the	O
lens	O
,	O
that	O
inter-connects	O
with	O
a	O
lever	O
on	O
the	O
front	O
of	O
the	O
camera	O
,	O
to	O
register	O
the	O
lens	O
 '	O
aperture	B-General_Concept
setting	O
with	O
the	O
camera	O
's	O
metering	O
system	O
.	O
</s>
<s>
In	O
1965	O
,	O
Konica	O
introduced	O
the	O
Auto-Reflex	B-Algorithm
line	O
of	O
cameras	O
and	O
lenses	O
,	O
which	O
do	O
not	O
share	O
the	O
same	O
bayonet	O
mount	O
as	O
the	O
F	O
and	O
its	O
immediate	O
successors	O
,	O
up	O
to	O
1964	O
's	O
FM	O
model	O
.	O
</s>
<s>
The	O
135mm	O
Hexanon	O
for	O
the	O
F	O
had	O
a	O
manual	B-General_Concept
aperture	I-General_Concept
,	O
but	O
the	O
other	O
lenses	O
featured	O
what	O
was	O
referred	O
to	O
as	O
"	O
fully	O
automatic	O
"	O
aperture	B-General_Concept
in	O
the	O
1960s	O
.	O
</s>
<s>
This	O
is	O
not	O
as	O
automated	O
as	O
apertures	B-General_Concept
eventually	O
became	O
.	O
</s>
<s>
At	O
that	O
time	O
it	O
meant	O
the	O
aperture	B-General_Concept
diaphragm	O
was	O
held	O
fully	O
open	O
during	O
focusing	O
,	O
to	O
make	O
for	O
a	O
brighter	O
viewfinder	O
and	O
render	O
a	O
shallow	O
depth	O
of	O
field	O
,	O
both	O
of	O
which	O
helped	O
with	O
focusing	O
.	O
</s>
<s>
Once	O
the	O
shutter	O
release	O
button	O
was	O
pressed	O
,	O
the	O
aperture	B-General_Concept
was	O
allowed	O
to	O
snap	O
down	O
to	O
the	O
pre-selected	O
setting	O
,	O
before	O
the	O
shutter	O
opened	O
to	O
expose	O
the	O
film	O
.	O
</s>
<s>
Further	O
,	O
the	O
aperture	B-General_Concept
re-opened	O
automatically	O
after	O
the	O
shutter	O
closed	O
.	O
</s>
