For more information about choosing a camera visit Photography Review's camera section . If you are using a compact camera, then you will need some film. If you are not sure whether your camera takes 35mm film or APS film, take the camera to the shop you are going to buy your film from. This refers to how quickly the film reacts when exposed to light. Slow speeds take the longest and are suitable for taking pictures in brighter conditions.
Faster speeds are more suited at taking pictures in duller conditions.
The speed of a film will be followed by the letters 'ISO' on the packaging. 200 ISO Outdoors, average weather. 400 ISO Indoors, Overcast, Flash Photography, Moving Subjects. For a more in-depth guide to films and photography visit this site . Plan what you want to photograph beforehand, as you will save yourself time, money, and film.