film speed

you might also be interested in these articles: shutter speed | aperture & stops | light value | exposure value

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shutter speed

you might also be interested in these articles: aperture & stops | film speed | light value | exposure value

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aperture & stops

you might also be interested in these articles: shutter speed | film speed | light value | exposure value

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Technical: aperture & stops

light value (Lv)

you might be interested in these articles: film speed | shutter speed | aperture & stops | weston master v

then you might want to read the next article: exposure value

This article should be read in conjunction with "Exposure Value", a term with which it is often confused.

Our everyday experience is one of looking at and seeing our environment. We are aware of bright objects, emitters of light such as the sun and artificial light sources. We are also aware of bright objects that do not by themselves emit light but reflect light. We can call them secondary sources.

Read more: light value (Lv)

exposure value (Ev)

you might want to read the previous article: light value

you might also be interested in these articles: film speed | shutter speed | aperture & stops | weston master v

This article should be read in conjunction with "Light Value", a term with which it is often confused.

Take any light-sensitive material and expose it to light and a photochemical reaction will take place. if you take a piece of photographic film out of the box and expose it in full daylight then all the light sensitive chemicals will be permanently changed.

When developed the film will be completely black - it will have been overexposed. Comparing this with a similar piece of film taken straight out of the box but not exposed to light, the film will be almost clear when developed.

Read more: exposure value (Ev)