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Andover Photo
27 Barnard St.
Andover, MA.
978-475-1452
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| The film speed indicates relative sensitivity to light.
Film speed is expressed as an ISO number or an exposure index (EI). The
higher the speed, the more sensitive or faster the film; the lower the
speed, the less sensitive or slower the film. A fast film requires less
light for proper exposure than a low-speed film. For example, a film with
a speed of ISO 25 is slower-requires more light than a film with a speed
of ISO 200. To find the speed number for your film, look on the film
carton, in the film instructions or on the film magazine. You set the film
speed on exposure meters on cameras with built-in meters to obtain the
correct exposure. Some cameras automatically set the film speed by reading
a code on DX-encoded films.
ISO speeds have replaced ASA speeds. ISO speed numbers are numerically
the same as ASA speed numbers. For example, if the speed of a film is ISO
(ASA) 200, you would set 200 on the ISO (ASA) dial of your camera or
meter.
| We recommend 400 speed film as an excellent multi-purpose film.
It yields clear colorful prints outdoors and great flash shots
indoors. |
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Andover Photo - Picture The Memories!