<s>
A	O
view	B-Algorithm
camera	I-Algorithm
is	O
a	O
large-format	O
camera	O
in	O
which	O
the	O
lens	O
forms	O
an	O
inverted	O
image	O
on	O
a	O
ground-glass	O
screen	O
directly	O
at	O
the	O
film	O
plane	O
.	O
</s>
<s>
It	O
comprises	O
a	O
flexible	O
bellows	B-Algorithm
that	O
forms	O
a	O
light-tight	O
seal	O
between	O
two	O
adjustable	O
standards	O
,	O
one	O
of	O
which	O
holds	O
a	O
lens	O
,	O
and	O
the	O
other	O
a	O
ground	O
glass	O
or	O
a	O
photographic	O
film	O
holder	O
or	O
a	O
digital	B-Algorithm
back	I-Algorithm
.	O
</s>
<s>
There	O
are	O
three	O
general	O
types	O
,	O
the	O
rail	O
camera	O
,	O
the	O
field	B-Algorithm
camera	I-Algorithm
,	O
and	O
others	O
that	O
do	O
n't	O
fit	O
into	O
either	O
category	O
.	O
</s>
<s>
The	O
bellows	B-Algorithm
is	O
a	O
flexible	O
,	O
accordion-pleated	O
box	O
.	O
</s>
<s>
At	O
the	O
other	O
end	O
of	O
the	O
bellows	B-Algorithm
,	O
the	O
rear	O
standard	O
is	O
a	O
frame	O
that	O
holds	O
a	O
ground	O
glass	B-Algorithm
plate	I-Algorithm
,	O
used	O
for	O
focusing	O
and	O
composing	O
the	O
image	O
before	O
exposure	O
—	O
and	O
is	O
replaced	O
by	O
a	O
holder	O
containing	O
the	O
light-sensitive	O
film	O
,	O
plate	B-Algorithm
,	O
or	O
image	B-Algorithm
sensor	I-Algorithm
for	O
exposure	O
.	O
</s>
<s>
Whereas	O
most	O
cameras	O
today	O
control	O
only	O
the	O
distance	O
of	O
the	O
plane	O
of	O
focus	O
from	O
the	O
camera	O
,	O
the	O
view	B-Algorithm
camera	I-Algorithm
can	O
also	O
provide	O
control	O
over	O
the	O
orientation	O
of	O
the	O
plane	O
of	O
focus	O
,	O
and	O
perspective	O
control	O
.	O
</s>
<s>
Several	O
types	O
of	O
view	B-Algorithm
cameras	I-Algorithm
are	O
used	O
for	O
different	O
purposes	O
,	O
and	O
provide	O
different	O
degrees	O
of	O
movement	O
and	O
portability	O
.	O
</s>
<s>
Rail	O
camera	O
-	O
There	O
is	O
the	O
smaller	O
more	O
maneuverable	O
monorail	B-Algorithm
camera	I-Algorithm
and	O
the	O
large	O
stable	O
immovable	O
multi-rail	O
camera	O
known	O
as	O
the	O
process	B-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
The	O
monorail	B-Algorithm
camera	I-Algorithm
is	O
the	O
most	O
common	O
type	O
of	O
studio	O
view	B-Algorithm
camera	I-Algorithm
,	O
with	O
front	O
and	O
rear	O
standards	O
mounted	O
to	O
a	O
single	O
rail	O
that	O
is	O
fixed	O
to	O
a	O
camera	O
support	O
.	O
</s>
<s>
These	O
are	O
generally	O
made	O
of	O
metal	O
with	O
leather	O
or	O
synthetic	O
bellows	B-Algorithm
,	O
and	O
are	O
difficult	O
to	O
pack	O
for	O
travel	O
.	O
</s>
<s>
Sinar	B-Algorithm
and	O
Toyo	O
are	O
popular	O
manufacturers	O
of	O
monorail	O
view	B-Algorithm
camera	I-Algorithm
systems	O
.	O
</s>
<s>
ARCA-Swiss	O
produces	O
monorail	B-Algorithm
cameras	I-Algorithm
for	O
field	O
use	O
in	O
addition	O
to	O
models	O
for	O
the	O
more	O
conventional	O
studio	O
applications	O
.	O
</s>
<s>
The	O
stationary	O
process	B-Algorithm
camera	I-Algorithm
is	O
used	O
for	O
copying	O
nearly	O
flat	O
artwork	O
that	O
is	O
held	O
to	O
a	O
copyboard	O
located	O
at	O
the	O
far	O
end	O
of	O
the	O
camera	O
rails	O
of	O
horizontally	O
mounted	O
cameras	O
,	O
or	O
at	O
the	O
base	O
of	O
vertical	O
cameras	O
.	O
</s>
<s>
Field	B-Algorithm
camera	I-Algorithm
-	O
These	O
have	O
the	O
front	O
and	O
rear	O
standard	O
mounted	O
on	O
sliding	O
rails	O
fixed	O
to	O
a	O
hinged	O
flat	O
bed	O
that	O
can	O
be	O
attached	O
to	O
a	O
camera	O
support	O
,	O
such	O
as	O
a	O
tripod	O
.	O
</s>
<s>
With	O
the	O
bellows	B-Algorithm
fully	O
retracted	O
,	O
the	O
flat	O
bed	O
folds	O
up	O
,	O
reducing	O
the	O
camera	O
to	O
a	O
relatively	O
small	O
,	O
light	O
,	O
and	O
portable	O
box	O
.	O
</s>
<s>
Tachihara	O
and	O
Wisner	O
are	O
examples	O
of	O
modern	O
field	B-Algorithm
cameras	I-Algorithm
at	O
opposite	O
ends	O
of	O
the	O
price	O
scale	O
.	O
</s>
<s>
Extremely	O
large	O
field	B-Algorithm
cameras	I-Algorithm
use	O
11×14	O
film	O
and	O
larger	O
,	O
or	O
panoramic	O
film	O
sizes	O
such	O
as	O
4×10	O
or	O
8×20	O
.	O
</s>
<s>
Studio	O
and	O
salon	O
cameras	O
are	O
similar	O
to	O
field	B-Algorithm
cameras	I-Algorithm
,	O
but	O
do	O
not	O
fold	O
up	O
for	O
portability	O
.	O
</s>
<s>
Folding	O
plate	B-Algorithm
cameras	O
with	O
limited	O
movements	O
were	O
often	O
used	O
.	O
</s>
<s>
Press	B-Algorithm
cameras	I-Algorithm
that	O
have	O
a	O
ground	O
glass	O
integral	O
to	O
the	O
film-holder	O
mechanism	O
allow	O
critical	O
focus	O
and	O
use	O
of	O
available	O
movements	O
.	O
</s>
<s>
Some	O
press	B-Algorithm
cameras	I-Algorithm
have	O
more	O
adjustment	O
capabilities	O
,	O
including	O
some	O
ability	O
to	O
tilt	O
the	O
rear	O
standard	O
,	O
and	O
can	O
be	O
either	O
hand-held	O
or	O
attached	O
to	O
a	O
tripod	O
for	O
support	O
.	O
</s>
<s>
Other	O
view	B-Algorithm
cameras	I-Algorithm
-	O
Many	O
unique	O
view	B-Algorithm
cameras	I-Algorithm
have	O
been	O
built	O
and	O
used	O
for	O
special	O
purposes	O
or	O
for	O
general	O
purpose	O
.	O
</s>
<s>
View	B-Algorithm
cameras	I-Algorithm
use	O
large	O
format	O
sheet	O
film	O
—	O
one	O
sheet	O
per	O
photograph	O
.	O
</s>
<s>
Standard	O
sizes	O
in	O
inches	O
are	O
:	O
4×5	O
,	O
5×7	O
,	O
4×10	O
,	O
5×12	O
,	O
8×10	O
,	O
11×14	O
,	O
7×17	O
,	O
8×20	O
,	O
12×20	O
,	O
20×24	O
,	O
and	O
larger	O
for	O
process	B-Algorithm
cameras	I-Algorithm
.	O
</s>
<s>
A	O
few	O
rollfilm	O
cameras	O
have	O
movements	O
that	O
make	O
them	O
as	O
versatile	O
as	O
a	O
sheet	O
film	O
view	B-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
Photographers	O
use	O
view	B-Algorithm
cameras	I-Algorithm
to	O
control	O
focus	O
and	O
convergence	B-General_Concept
of	I-General_Concept
parallel	I-General_Concept
lines	I-General_Concept
.	O
</s>
<s>
Some	O
limited	O
view	B-Algorithm
camera	I-Algorithm
–	O
type	O
movements	O
are	O
possible	O
with	O
SLR	B-Algorithm
cameras	I-Algorithm
using	O
various	O
tilt/shift	O
lenses	O
.	O
</s>
<s>
Also	O
,	O
as	O
use	O
of	O
view	B-Algorithm
cameras	I-Algorithm
declines	O
in	O
favor	O
of	O
digital	O
photography	O
,	O
these	O
movements	O
are	O
simulated	O
using	O
computer	O
software	O
.	O
</s>
<s>
In	O
the	O
35mm	O
format	O
,	O
special	O
shift	O
lenses	O
(	O
sometimes	O
called	O
perspective	O
control	O
lenses	O
)	O
emulate	O
the	O
rise	O
or	O
fall	O
of	O
view	B-Algorithm
cameras	I-Algorithm
.	O
</s>
<s>
In	O
Figure	O
a	O
)	O
below	O
(	O
images	O
are	O
upside	O
down	O
,	O
as	O
a	O
photographer	O
would	O
see	O
them	O
on	O
the	O
ground	O
glass	O
of	O
a	O
view	B-Algorithm
camera	I-Algorithm
)	O
,	O
the	O
lens	O
has	O
been	O
shifted	O
down	O
(	O
fall	O
)	O
.	O
</s>
<s>
Depth	O
of	O
field	O
depends	O
on	O
the	O
focal	B-Algorithm
length	I-Algorithm
,	O
aperture	B-General_Concept
,	O
and	O
subject	O
distance	O
.	O
</s>
<s>
Therefore	O
,	O
depending	O
on	O
the	O
shape	O
of	O
the	O
subject	O
,	O
a	O
wider	O
aperture	B-General_Concept
can	O
be	O
used	O
,	O
lessening	O
concerns	O
about	O
camera	O
stability	O
due	O
to	O
slow	O
shutter	O
speed	O
and	O
diffraction	O
due	O
to	O
too-small	O
aperture	B-General_Concept
.	O
</s>
<s>
Tilting	O
achieves	O
the	O
desired	O
depth	O
of	O
field	O
using	O
the	O
aperture	B-General_Concept
at	O
which	O
the	O
lens	O
performs	O
best	O
.	O
</s>
<s>
Too	O
small	O
an	O
aperture	B-General_Concept
risks	O
losses	O
to	O
diffraction	O
and	O
camera/subject	O
motion	O
what	O
is	O
gained	O
from	O
depth	O
of	O
field	O
.	O
</s>
<s>
Only	O
testing	O
a	O
given	O
scene	O
,	O
or	O
experience	O
,	O
shows	O
whether	O
tilting	O
is	O
better	O
than	O
leaving	O
the	O
standards	O
neutral	O
and	O
relying	O
on	O
the	O
aperture	B-General_Concept
alone	O
to	O
achieve	O
the	O
desired	O
depth	O
of	O
field	O
.	O
</s>
<s>
When	O
a	O
lens	O
is	O
a	O
certain	O
distance	O
(	O
its	O
focal	B-Algorithm
length	I-Algorithm
)	O
away	O
from	O
the	O
film	O
,	O
distant	O
objects	O
,	O
such	O
as	O
faraway	O
mountains	O
,	O
are	O
in	O
focus	O
.	O
</s>
<s>
Thus	O
,	O
rear	O
movements	O
allow	O
a	O
change	O
of	O
perspective	O
by	O
allowing	O
a	O
different	O
camera	O
location	O
,	O
yet	O
no	O
view	B-Algorithm
camera	I-Algorithm
movement	O
actually	O
alters	O
perspective	O
.	O
</s>
<s>
A	O
view	B-Algorithm
camera	I-Algorithm
lens	O
typically	O
consists	O
of	O
:	O
</s>
<s>
A	O
lensboard	O
—	O
a	O
flat	O
board	O
,	O
typically	O
square	O
in	O
shape	O
and	O
made	O
of	O
metal	O
or	O
wood	O
,	O
that	O
locks	O
securely	O
into	O
the	O
front	O
standard	O
of	O
a	O
particular	O
view	B-Algorithm
camera	I-Algorithm
,	O
with	O
a	O
central	O
hole	O
of	O
the	O
right	O
size	O
to	O
insert	O
a	O
lens	O
and	O
shutter	O
assembly	O
,	O
usually	O
secured	O
and	O
made	O
light-tight	O
by	O
screwing	O
a	O
ring	O
onto	O
a	O
thread	O
on	O
the	O
rear	O
of	O
the	O
lens	O
assembly	O
.	O
</s>
<s>
Almost	O
any	O
lens	O
of	O
the	O
appropriate	O
coverage	O
area	O
may	O
be	O
used	O
with	O
almost	O
any	O
view	B-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
Not	O
all	O
lensboards	O
work	O
with	O
all	O
models	O
of	O
view	B-Algorithm
camera	I-Algorithm
,	O
though	O
different	O
cameras	O
may	O
be	O
designed	O
to	O
work	O
with	O
a	O
common	O
lensboard	O
type	O
.	O
</s>
<s>
Copal	O
is	O
the	O
most	O
popular	O
maker	O
of	O
leaf	O
shutters	O
for	O
view	B-Algorithm
camera	I-Algorithm
lenses	O
.	O
</s>
<s>
View	B-Algorithm
camera	I-Algorithm
lenses	O
are	O
designed	O
with	O
both	O
focal	B-Algorithm
length	I-Algorithm
and	O
coverage	O
in	O
mind	O
.	O
</s>
<s>
Very	O
long	O
focus	O
lenses	O
may	O
require	O
that	O
the	O
camera	O
be	O
fitted	O
with	O
special	O
extra-long	O
rails	O
and	O
bellows	B-Algorithm
.	O
</s>
<s>
Very	O
short	O
focal	B-Algorithm
length	I-Algorithm
wide-angle	O
lenses	O
may	O
require	O
that	O
the	O
standards	O
be	O
closer	O
together	O
than	O
a	O
normal	O
concertina-folded	O
bellows	B-Algorithm
allows	O
.	O
</s>
<s>
Such	O
a	O
situation	O
requires	O
a	O
bag	O
bellows	B-Algorithm
,	O
a	O
simple	O
light-tight	O
flexible	O
bag	O
.	O
</s>
<s>
Zoom	O
lenses	O
are	O
not	O
used	O
in	O
view	B-Algorithm
camera	I-Algorithm
photography	O
,	O
as	O
there	O
is	O
no	O
need	O
for	O
rapid	O
and	O
continuous	O
change	O
of	O
focal	B-Algorithm
length	I-Algorithm
with	O
static	O
subjects	O
,	O
and	O
the	O
price	O
,	O
size	O
,	O
weight	O
,	O
and	O
complexity	O
would	O
be	O
excessive	O
.	O
</s>
<s>
Some	O
lenses	O
are	O
"	O
convertible	O
"	O
:	O
the	O
front	O
or	O
rear	O
element	O
only	O
,	O
or	O
both	O
elements	O
,	O
may	O
be	O
used	O
,	O
giving	O
three	O
different	O
focal	B-Algorithm
lengths	I-Algorithm
,	O
though	O
the	O
quality	O
of	O
the	O
single	O
elements	O
is	O
not	O
as	O
good	O
at	O
larger	O
apertures	B-General_Concept
as	O
the	O
combination	O
.	O
</s>
<s>
These	O
are	O
popular	O
with	O
field	O
photographers	O
who	O
can	O
save	O
weight	O
by	O
carrying	O
one	O
convertible	O
lens	O
rather	O
than	O
two	O
or	O
three	O
lenses	O
of	O
different	O
focal	B-Algorithm
lengths	I-Algorithm
.	O
</s>
<s>
The	O
degree	O
of	O
soft-focus	O
effect	O
is	O
determined	O
by	O
either	O
aperture	B-General_Concept
size	O
or	O
special	O
disks	O
that	O
fit	O
into	O
the	O
lens	O
to	O
modify	O
the	O
aperture	B-General_Concept
shape	O
.	O
</s>
<s>
Some	O
antique	O
lenses	O
,	O
and	O
some	O
modern	O
SLR	B-Algorithm
soft	O
focus	O
lenses	O
,	O
provide	O
a	O
lever	O
that	O
controls	O
the	O
softening	O
effect	O
by	O
altering	O
the	O
optical	O
formula	O
.	O
</s>
<s>
View	B-Algorithm
cameras	I-Algorithm
use	O
sheet	O
film	O
but	O
can	O
use	O
roll	O
film	O
(	O
generally	O
120/220	O
size	O
)	O
by	O
using	O
special	O
roll	O
film	O
holders	O
.	O
</s>
<s>
Digital	B-Algorithm
camera	I-Algorithm
backs	I-Algorithm
are	O
available	O
for	O
view	B-Algorithm
cameras	I-Algorithm
to	O
create	O
digital	B-Algorithm
images	I-Algorithm
instead	O
of	O
using	O
film	O
.	O
</s>
<s>
Prices	O
are	O
high	O
compared	O
to	O
smaller	O
digital	B-Device
cameras	I-Device
.	O
</s>
<s>
Usually	O
a	O
tripod	O
is	O
used	O
—	O
a	O
camera	O
with	O
a	O
long	O
bellows	B-Algorithm
extension	O
may	O
require	O
two	O
.	O
</s>
<s>
To	O
operate	O
the	O
view	B-Algorithm
camera	I-Algorithm
,	O
the	O
photographer	O
opens	O
the	O
shutter	O
on	O
the	O
lens	O
to	O
focus	O
and	O
compose	O
the	O
image	O
on	O
a	O
ground	O
glass	B-Algorithm
plate	I-Algorithm
on	O
the	O
rear	O
standard	O
.	O
</s>
<s>
The	O
shutter	O
is	O
then	O
closed	O
and	O
cocked	O
,	O
the	O
shutter	O
speed	O
and	O
aperture	B-General_Concept
set	O
.	O
</s>
<s>
Sheet	O
film	O
holders	O
are	O
generally	O
interchangeable	O
between	O
various	O
brands	O
and	O
models	O
of	O
view	B-Algorithm
cameras	I-Algorithm
,	O
adhering	O
to	O
de	O
facto	O
standards	O
.	O
</s>
<s>
A	O
Grafmatic	O
,	O
for	O
example	O
,	O
can	O
fit	O
six	O
sheets	O
of	O
film	O
in	O
the	O
space	O
of	O
an	O
ordinary	O
two-sheet	O
holder	O
,	O
and	O
some	O
light	O
meters	O
have	O
an	O
attachment	O
that	O
inserts	O
into	O
the	O
film	O
holder	O
slot	O
on	O
the	O
camera	B-Algorithm
back	I-Algorithm
so	O
the	O
photographer	O
can	O
measure	O
light	O
that	O
falls	O
at	O
a	O
specific	O
point	O
on	O
the	O
film	O
plane	O
.	O
</s>
<s>
The	O
entire	O
film	O
holder/back	O
assembly	O
is	O
often	O
an	O
industry	O
standard	O
Graflex	B-Algorithm
back	O
,	O
removable	O
so	O
accessories	O
like	O
roll-film	O
holders	O
and	O
digital	B-Algorithm
imagers	I-Algorithm
can	O
be	O
used	O
without	O
altering	O
focus	O
.	O
</s>
<s>
A	O
camera	O
with	O
tilts	O
and	O
swings	O
lets	O
the	O
photographer	O
skew	O
the	O
plane	O
of	O
focus	O
away	O
from	O
the	O
parallel	O
in	O
any	O
direction	O
,	O
which	O
in	O
many	O
cases	O
can	O
bring	O
the	O
image	O
of	O
a	O
subject	O
that	O
is	O
not	O
parallel	O
to	O
the	O
lens	O
plane	O
into	O
near-to-far	O
focus	O
without	O
stopping	O
down	O
the	O
aperture	B-General_Concept
excessively	O
.	O
</s>
<s>
With	O
a	O
view	B-Algorithm
camera	I-Algorithm
the	O
rear	O
standard	O
can	O
be	O
swung	O
toward	O
the	O
wall	O
to	O
reduce	O
this	O
convergence	O
.	O
</s>
<s>
Shallow	O
depth	O
of	O
field	O
:	O
view	B-Algorithm
cameras	I-Algorithm
require	O
longer	O
focal	B-Algorithm
length	I-Algorithm
lenses	O
than	O
smaller	O
format	O
cameras	O
,	O
especially	O
for	O
the	O
larger	O
sizes	O
,	O
with	O
shallower	O
depth	O
of	O
field	O
,	O
letting	O
the	O
photographer	O
focus	O
solely	O
on	O
the	O
subject	O
.	O
</s>
<s>
Smaller	O
apertures	B-General_Concept
can	O
be	O
used	O
:	O
much	O
smaller	O
apertures	B-General_Concept
can	O
be	O
used	O
than	O
with	O
smaller	O
format	O
cameras	O
before	O
diffraction	O
becomes	O
significant	O
for	O
a	O
given	O
print	O
size	O
.	O
</s>
<s>
Lack	O
of	O
automation	O
:	O
most	O
view	B-Algorithm
cameras	I-Algorithm
are	O
fully	O
manual	O
,	O
requiring	O
time	O
,	O
and	O
allowing	O
even	O
experienced	O
photographers	O
to	O
make	O
mistakes	O
.	O
</s>
<s>
Some	O
cameras	O
,	O
such	O
as	O
Sinars	B-Algorithm
,	O
have	O
some	O
degree	O
of	O
automation	O
with	O
self-cocking	O
shutters	O
and	O
film-plane	O
metering	O
.	O
</s>
<s>
Steep	O
learning	O
curve	O
:	O
In	O
addition	O
to	O
needing	O
the	O
knowledge	O
required	O
to	O
operate	O
a	O
fully	O
manual	O
camera	O
,	O
view	B-Algorithm
camera	I-Algorithm
operators	O
must	O
understand	O
a	O
large	O
number	O
of	O
technical	O
matters	O
that	O
are	O
not	O
an	O
issue	O
to	O
most	O
small	O
format	O
photographers	O
.	O
</s>
<s>
They	O
must	O
understand	O
,	O
for	O
example	O
,	O
view	B-Algorithm
camera	I-Algorithm
movements	O
,	O
bellows	B-Algorithm
factors	O
,	O
and	O
reciprocity	O
.	O
</s>
<s>
A	O
great	O
amount	O
of	O
time	O
and	O
study	O
is	O
needed	O
to	O
master	O
those	O
aspects	O
of	O
large	O
format	O
photography	O
,	O
so	O
learning	O
view	B-Algorithm
camera	I-Algorithm
operation	O
requires	O
a	O
high	O
degree	O
of	O
dedication	O
.	O
</s>
<s>
Large	O
size	O
and	O
weight	O
:	O
monorail	O
view	B-Algorithm
cameras	I-Algorithm
are	O
unsuitable	O
for	O
handheld	O
photography	O
and	O
are	O
in	O
most	O
cases	O
difficult	O
to	O
transport	O
.	O
</s>
<s>
A	O
folding	O
bed	O
field	B-Algorithm
camera	I-Algorithm
like	O
a	O
Linhof	O
Technika	O
with	O
a	O
lens-coupled	O
range	O
finder	O
system	O
even	O
allows	O
action	O
photography	O
.	O
</s>
<s>
Shallow	O
depth	O
of	O
field	O
:	O
view	B-Algorithm
cameras	I-Algorithm
require	O
longer	O
focal	B-Algorithm
length	I-Algorithm
lenses	O
than	O
smaller	O
format	O
cameras	O
,	O
especially	O
for	O
the	O
larger	O
sizes	O
,	O
with	O
shallower	O
depth	O
of	O
field	O
.	O
</s>
<s>
Small	O
maximum	O
aperture	B-General_Concept
:	O
it	O
is	O
not	O
feasible	O
to	O
make	O
long	O
focal	B-Algorithm
length	I-Algorithm
lenses	O
with	O
the	O
wide	O
maximum	O
apertures	B-General_Concept
available	O
with	O
shorter	O
focal	B-Algorithm
lengths	I-Algorithm
.	O
</s>
<s>
High	O
cost	O
:	O
there	O
is	O
limited	O
demand	O
for	O
view	B-Algorithm
cameras	I-Algorithm
,	O
so	O
that	O
there	O
are	O
no	O
economies	O
of	O
scale	O
and	O
they	O
are	O
much	O
more	O
expensive	O
than	O
mass-produced	O
cameras	O
.	O
</s>
<s>
Because	O
view	B-Algorithm
cameras	I-Algorithm
are	O
rather	O
difficult	O
to	O
set	O
up	O
and	O
focus	O
,	O
the	O
photographer	O
must	O
seek	O
the	O
best	O
camera	O
position	O
,	O
perspective	O
,	O
etc	O
.	O
</s>
