Publicidad
ENGLISH
(7) SETTING THE APERTURE
The aperture of the lens controls the amount of light passing through the lens to the film
surface. If the scale of the aperture ring is increased by one (f2.8 - f4) the amount of light
is halted as indicated in the following table. The Cosina CT-10/CT-20 automatically set the
correct exposure, all you have to do is set the aperture. The following table will give you a
guide with regard to the best aperture to use in different light conditions.
1; Aperture
2: Light Amount ^
Ratio
2.8
n
1/2
4
5.6
8
1/4
1/8 1/16
11
16
1/32 1/64
The aperture ring usually has gradations marked as above, taking F2 lens
Fig.14
Light
Aperture
Bright Indoors
2 to 4
Fine Outdoor
. 8 to 11
Mid-summer Beach
Snow-covered
Mountains
11 to 16
Publicidad
