<s>
Monorail	B-Algorithm
cameras	I-Algorithm
are	O
view	B-Algorithm
cameras	I-Algorithm
with	O
lens	O
mount	O
,	O
bellows	B-Algorithm
,	O
and	O
interchangeable	O
viewing	O
and	O
film	O
backs	O
all	O
fitted	O
along	O
a	O
rigid	O
rail	O
along	O
which	O
they	O
can	O
slide	O
until	O
locked	O
into	O
position	O
.	O
</s>
<s>
They	O
can	O
take	O
sheet	O
film	O
in	O
large	O
sizes	O
,	O
and	O
since	O
the	O
advent	O
of	O
digital	B-Application
photography	I-Application
can	O
take	O
a	O
digital	B-Algorithm
back	I-Algorithm
.	O
</s>
<s>
They	O
are	O
used	O
to	O
take	O
very	O
high-quality	O
photographs	O
of	O
static	O
subjects	O
on	O
large	O
film	O
,	O
or	O
at	O
high	O
digital	O
image	B-Algorithm
resolution	I-Algorithm
,	O
and	O
capable	O
of	O
much	O
enlargement	O
with	O
good	O
quality	O
.	O
</s>
<s>
Monorail	B-Algorithm
cameras	I-Algorithm
rarely	O
have	O
any	O
other	O
viewfinder	O
than	O
the	O
ground	O
glass	O
.	O
</s>
<s>
Virtually	O
any	O
lens	O
can	O
be	O
fitted	O
,	O
and	O
backs	O
for	O
sheet	O
film	O
,	O
rollfilm	O
,	O
digital	B-Algorithm
back	I-Algorithm
and	O
Polaroid	O
backs	O
.	O
</s>
<s>
Extremely	O
small	O
apertures	B-General_Concept
such	O
as	O
64	O
can	O
be	O
used	O
without	O
issues	O
of	O
diffraction	O
on	O
the	O
lenses	O
,	O
of	O
much	O
larger	O
focal	O
length	O
than	O
those	O
used	O
for	O
smaller	O
images	O
(	O
a	O
small	O
relative	O
aperture	B-General_Concept
is	O
still	O
a	O
fairly	O
large	O
hole	O
,	O
reducing	O
diffraction	O
)	O
.	O
</s>
<s>
Monorail	B-Algorithm
cameras	I-Algorithm
have	O
capabilities	O
that	O
most	O
other	O
cameras	O
do	O
not	O
.	O
</s>
<s>
Monorail	B-Algorithm
cameras	I-Algorithm
are	O
among	O
the	O
simplest	O
cameras	O
possible	O
according	O
to	O
their	O
operating	O
principles	O
,	O
consisting	O
of	O
the	O
front	O
standard	O
(	O
holding	O
the	O
lens	O
)	O
and	O
rear	O
standard	O
(	O
holding	O
the	O
ground	O
glass	O
viewing	O
and	O
focussing	O
screen	O
,	O
then	O
replaced	O
by	O
the	O
film	O
)	O
sliding	O
on	O
a	O
single	O
rail	O
,	O
with	O
a	O
light-tight	O
bellows	B-Algorithm
stretched	O
between	O
.	O
</s>
<s>
When	O
photographing	O
subjects	O
which	O
must	O
be	O
very	O
accurately	O
represented	O
,	O
for	O
example	O
in	O
making	O
a	O
mask	O
for	O
integrated	O
circuit	O
manufacture	O
,	O
apochromatic	O
lenses	O
of	O
very	O
high	O
geometric	O
accuracy	O
and	O
minimal	O
color	O
aberration	O
(	O
traded	O
off	O
against	O
a	O
small	O
maximum	O
aperture	B-General_Concept
)	O
and	O
high	O
price	O
,	O
are	O
used	O
.	O
</s>
<s>
Unlike	O
with	O
most	O
other	O
cameras	O
,	O
lenses	O
used	O
with	O
view	B-Algorithm
cameras	I-Algorithm
(	O
including	O
monorails	O
)	O
are	O
rarely	O
manufactured	O
by	O
the	O
body	O
manufacturer	O
.	O
</s>
<s>
A	O
digital	B-Algorithm
back	I-Algorithm
from	O
yet	O
another	O
manufacturer	O
may	O
be	O
used	O
.	O
</s>
<s>
Several	O
companies	O
produce	O
monorail	B-Algorithm
camera	I-Algorithm
bodies	O
,	O
including	O
Arca-Swiss	O
,	O
Ebony	O
,	O
Horseman	O
,	O
Linhof	O
,	O
Cambo	O
,	O
Sinar	B-Algorithm
,	O
and	O
Toyo	O
.	O
</s>
<s>
Older	O
monorail	B-Algorithm
cameras	I-Algorithm
are	O
available	O
second-hand	O
;	O
unlike	O
most	O
other	O
cameras	O
they	O
are	O
relatively	O
immune	O
to	O
obsolescence	O
,	O
so	O
long	O
as	O
parts	O
and	O
accessories	O
are	O
available	O
.	O
</s>
