<s>
The	O
Minolta	B-Algorithm
9000	I-Algorithm
AF	O
is	O
a	O
professional	O
Single-lens	B-Algorithm
reflex	I-Algorithm
autofocus	O
camera	O
,	O
introduced	O
by	O
Minolta	O
in	O
August	O
1985	O
.	O
</s>
<s>
It	O
was	O
both	O
Minolta	O
's	O
and	O
the	O
world	O
's	O
first	O
professional	O
autofocus	O
SLR	B-Algorithm
.	O
</s>
<s>
It	O
was	O
called	O
Minolta	B-Algorithm
Maxxum	I-Algorithm
9000	I-Algorithm
in	O
the	O
US	O
and	O
Minolta	O
α-9000	O
in	O
Japan	O
.	O
</s>
<s>
As	O
the	O
first	O
professional	O
autofocus	O
SLR	B-Algorithm
system	O
ever	O
made	O
,	O
the	O
Minolta	B-Algorithm
9000	I-Algorithm
AF	O
sports	O
a	O
number	O
of	O
unique	O
features	O
showing	O
the	O
transition	O
from	O
electro-mechanical	O
cameras	O
to	O
the	O
next	O
generation	O
of	O
fully	O
electronic	O
cameras	O
.	O
</s>
<s>
In	O
the	O
early	O
1980s	O
,	O
Minolta	O
was	O
developing	O
several	O
ranges	O
of	O
autofocus	O
SLR	B-Algorithm
cameras	I-Algorithm
,	O
with	O
the	O
Minolta	B-Algorithm
7000	I-Algorithm
aimed	O
at	O
the	O
advanced	O
amateur	O
market	O
,	O
and	O
the	O
Minolta	B-Algorithm
9000	I-Algorithm
aimed	O
at	O
the	O
professional	O
market	O
.	O
</s>
<s>
Development	O
on	O
the	O
Minolta	B-Algorithm
9000	I-Algorithm
was	O
completed	O
before	O
that	O
of	O
the	O
Minolta	B-Algorithm
7000	I-Algorithm
,	O
but	O
for	O
marketing	O
purposes	O
,	O
the	O
9000	O
was	O
held	O
back	O
and	O
the	O
7000	O
was	O
launched	O
first	O
in	O
February	O
1985	O
.	O
</s>
<s>
In	O
any	O
case	O
,	O
the	O
Minolta	B-Algorithm
9000	I-Algorithm
AF	O
was	O
the	O
first	O
professional	O
SLR	B-Algorithm
system	O
featuring	O
a	O
wide	O
range	O
of	O
autofocus-capable	O
accessories	O
,	O
with	O
the	O
New	O
York	O
Times	O
calling	O
it	O
"	O
The	O
first	O
35-millimeter	O
automatic-focusing	O
camera	O
built	O
for	O
professional	O
use	O
"	O
and	O
"	O
revolutionary	O
"	O
,	O
and	O
Leif	O
Ericksenn	O
,	O
editor-in-chief	O
of	O
Photo	O
Methods	O
magazine	O
calling	O
it	O
"	O
one	O
of	O
the	O
most	O
astonishing	O
cameras	O
of	O
the	O
decade	O
"	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
its	O
introduction	O
,	O
the	O
Minolta	B-Algorithm
9000	I-Algorithm
retailed	O
for	O
$684	O
(	O
circa	O
$1580	O
in	O
2017	O
)	O
.	O
</s>
<s>
The	O
body	O
of	O
the	O
Minolta	B-Algorithm
9000	I-Algorithm
is	O
a	O
robust	O
all-metal	O
construction	O
,	O
with	O
the	O
pentaprism	O
being	O
the	O
only	O
component	O
not	O
to	O
be	O
completely	O
encased	O
in	O
metal	O
.	O
</s>
<s>
The	O
exposure	O
meter	O
provided	O
the	O
user	O
with	O
the	O
usual	O
range	O
of	O
automatic	O
exposure	O
modes	O
:	O
automatic	O
,	O
shutter	B-Algorithm
priority	I-Algorithm
,	O
aperture	B-Algorithm
priority	I-Algorithm
and	O
manual	O
mode	O
.	O
</s>
<s>
As	O
metering	B-Algorithm
modes	I-Algorithm
,	O
it	O
was	O
capable	O
of	O
centre-weighted	O
integral	O
metering	O
and	O
spot	O
metering	O
;	O
spot	O
metering	O
could	O
be	O
further	O
refined	O
with	O
light	O
and	O
shadow	O
corrections	O
,	O
which	O
used	O
an	O
exposure	O
memory	O
to	O
correct	O
exposure	O
by	O
up	O
to	O
2.3	O
EV	O
.	O
</s>
<s>
The	O
Minolta	B-Algorithm
9000	I-Algorithm
also	O
accepted	O
a	O
variety	O
of	O
focusing	O
screens	O
,	O
a	O
lockable	O
button	O
for	O
depth	O
of	O
field	O
preview	O
,	O
lighting	O
of	O
the	O
viewfinder	O
and	O
a	O
built-in	O
eyepiece	O
to	O
protect	O
the	O
eye	O
of	O
the	O
photographer	O
from	O
lateral	O
light	O
.	O
</s>
<s>
The	O
Minolta	B-Algorithm
9000	I-Algorithm
was	O
compatible	O
with	O
Minolta	O
AF	O
accessories	O
,	O
including	O
a	O
full	O
range	O
of	O
lenses	O
in	O
Minolta	B-Algorithm
A-mount	I-Algorithm
,	O
flash	O
units	O
,	O
and	O
various	O
other	O
accessories	O
such	O
as	O
a	O
5-frame/second	O
motor	O
winder	O
,	O
a	O
100-exposure	O
magazine	O
and	O
several	O
backs	O
.	O
</s>
<s>
Type	O
:	O
Fully	O
automatic	O
SLR	B-Algorithm
camera	I-Algorithm
body	O
(	O
exception	O
:	O
manual	O
film	O
advance	O
)	O
made	O
of	O
aluminium	O
,	O
brass	O
and	O
steel	O
.	O
</s>
<s>
Flash	O
:	O
PC-socket	O
plus	O
TTL-enabled	O
hot	B-Algorithm
shoe	I-Algorithm
for	O
Minolta	O
AF-flashes	O
,	O
shutter	O
synchronized	O
for	O
speeds	O
up	O
to	O
1/250	O
sec	O
.	O
</s>
