Advertisement
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
Effectiveness of Filters
om
uv
1
Absorbs only ultra-violet rays. Especially effective at seaside, and high
mountains. Recommended for use in color photography.
1.5
2
Increases contrast of black and white film. Enhances clouds, darkens
the blue sky
Brightens red and yellow.
0
R1
6
Makes strong contrasts. May also be used with infrared film.
om
ND4
ND8
4
8
ND4 reduces light values by 1/4, ND8 by 1/8. No effect on the reproduc¬
tion of colors.
•
SKYLIGHT
1
Acts to harmonize the blue sky and shade.
•
CCA4
1.5
For use with daylight type film under the cloud.
•
CCA8
2
For use with universal type (color negative) film under the cloud or
tungsten type film under the morning sun or sunset.
•
CCA (12)
2
For use with tungsten type film under sunlight.
•
CCB4
1.5
For use with daylight type film under the morning sun or sunset.
•
CCB8
2
For use with daylight type film and clear flash bulb.
•
CCB (12)
3
For use with daylight type film under tungsten light.
O
For black and white film.
•
For color film
25
Advertisement
