Voigtldnde
r Filters
ore
hord
cooted
ond
corry
q
32
mm. dio.
push-on
mount.
Every
filter
(except
for
the ultro-violet
filter)
needs
some
extro
exposure.
The
exposure
increose
in the
form
of
q
fitter
foctor,
is morked
on
the
filter,
e.
g.4
x
(exposure
without
filter
1/rzs
second
-
with
filter
1/ro
second).
Yetrow
firrer G
r.5
x
l[y,!1tllj;i::?,:tl:.ff,:-tg:,1,iff,*it;,I:""'
ror
sports
ond
Filter foctor:
1.5
x, or
open
the
lens
operture
by
llz
stop.
Yellow
filter G
3
x
i,ti6:'fl"f'll"l"lllfi::Lm
other
outdoor
subiects;
Filtei foctor:
3x,
or
open
the
operture
by
ll/: stops.
Green
firrer
Gr
4
x
iti:i"i[fJ?T,H?,";J'":,T*"r;;,1";".:,!:l3jo"lil"Tl'i:
Filter foctor:
4x,
or open the'operture
by 2
stops.
Oronse
filter Or
5
x
ilgtld::nrllYi"l"r:
dromotic
effects'
Reduces
otmospheric
Filter
foctor:
5
x, or
open
the
lens
operture
by 2tlz
stops.
Cuts
out
ultro-violet
rodiotion
in high
mountoins
or
neor
th"
r"o.
Eliminotes
unpleosont
blue
costs
in colour
shots.
Requires
no exposure
increose.
Ultrq-violet
filter
UV
-12-
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