Films

 

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In order to make a good picture, it's important to know what's going on inside that camera.

Your basic film is built in layers. The first is an anti-scratch layer, so that you can't molest your film. The second layer is an emulsion layer. This is where the actual chemical process lies. The film contains little silverlike bolls that turn black when they get hit by light. The longer they are exposed to light, the blacker they'll become. The third layer is some sort of sticky layer. The fourth layer is a plastic layer, which consists of polyethylen. The fifth and last liyer is an anti-halo layer. This one absorbs the light.

Different Films

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There's lots of different films. There's ISO and ASA. This is, what has been discussed in Cameratechniques the sensitivity of the light. A film of 3200 ISO won't need so much light to function properly. A film with 25 ISO will need a big chunk of light to work. So why use those? Well, for one thing, low ISO films are highly detailled and are often used for landscapes, studio photography and still lives.

3200 ISO is often used for concerts, sports and places where a flash is forbidden like theaters or museums.

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