Canon SCOOPIC 16 - Manual (Page 42)

Filters
A wide variety of Canon Filters 72mm (screw-in
type) and Series IX are available. When using
filters, exposure time must be increased accord­
ing to the exposure factor of the filter to be used.
A lens hood attachment screw is also available.
Compensation Filter ND4 for CdS Window
The compensation filter ND4 for the CdS wind­
ow is available.
Canon Filters 72mm/Series No. 9
Type ' Exposure Factor
»
o* uv 1
Y1 1.5
Y3
2
. 0 R1
6
o# ND4
ND8 4
8
m
• SKYLIGHT 1
CCA4 1.5
• CCA8
2
CCAil2j
2
• CCB4 1.5
• CCB8
2
« •
CCBC12) 3
Effectiveness of Filters
Absorbs only ultra-violet rays. Especially effective at seaside, and high
mountains. Recommended for use in color photography.
Increases contrast of black and white film,
the blue sky. Brightens red and yellow.
Enhances clouds, darkens
Makes strong contrasts. May also be used with infrared film.
ND4- reduces light values by 1/4, ND8 by 1/8. No effect on the reproduc­
tion of colors.
Acts to harmonize the blue sky and shade.
For use with daylight type film under the cloud.
For use with universal type (color negative) film under the cloud or
tungsten type film under the morning sun or sunset.
For use with tungsten type film under sunlight.
For use with daylight type film under the morning sun or sunset.
For use with daylight type film and clear flash bulb.
For use with daylight type film under tungsten light.
O For black and white film. # For color filn
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