ABSTRACT
Film speed is the setting that governs the sensitivity of photographer’s camera's image sensor. It mirrors the way that the photographers used to rate physical film in terms of sensitivity, and follows a pretty standard scale. The trade-off photographers must be aware of: The faster the film speed, the greater the "grain" or "pixilation" of the resultant image. The slower the film speed the greater the amount of light that is required to capture the image. If all film speeds were the same, then photographers would just shoot really fast film and be done with things, but the images photographers get with faster film speeds are potentially very grainy, and may not be suitable for large, glossy portfolio prints. On the other hand, photographers often find themselves shooting very dark scenes, which are not conducive to quality exposures with slower film, and they may want to use a faster film speed to help get the correct exposure.
