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NEUTRAL DENSITY
(ND)
FILTERS
These
filters
can
be used
with
color or black and
white
films. They serve to
reduce the intensity of light when films of high ASA or DIN indexes are used.
Canon manufactures two Neutral Density Filters, the ND 4 and ND 8,
which
reduce the amount of
light
penetrating to the film by lour and eight times
respectively
.
When
such
filters are used the index of a
given
film is altered as follows:
1.
ASA 640 film
+
NO
4
ASA
160 film.
2.
ASA 640 film
+
ND 8
ASA
80 film.
Neutral Density Filters can also be
used
together
with
other types of filters for
both black and
white
and color films.
CANON 34
mm
CLOSE·UP LENS 450
This is used lor film titling as
we ll as close-up work
.
Close-up Lens is
01
screw-In
type. See the chart below lor
specifications ...
Focal
Length
Distance
Scale
I
Distance from Film
'
Field-of-View
of Zoom Lens
of Focusing Ring
plane
to
Object
(inch)
(mm)
(feet)
(meter)
(feet)
(mm.)
1
'9"
5
/ 16
541
5"/
3 /16 X
7
13
h6
- -
10
mm
00
00
148
x
197
4
1.2
1'4
"
5
116
413
4"X
5"
3
/8
102x136
40
mm
OX>
00
1 '9
"
5
/
1
6
541
1"1
/
2
X 1"7
/
8
37~
4
1.2
1 '4"
5 116
413
1"
X
1"
5 /16
26
X
34
31
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