Which film speed is most commonly used by fire investigators?

The most commonly used film speed by fire investigators is 35mm. This film format provides a balance between quality and versatility, allowing investigators to capture detailed images necessary for analysis. The 35mm format is widely adopted because it is compatible with a variety of cameras and lenses, offering flexibility in different lighting conditions often encountered at fire scenes.

While film speed (ISO or ASA ratings) indicates sensitivity to light, the choice of 35mm relates more to the film format itself, making it a preferred choice. Fire investigators often need to document scenes effectively, and the quality of 35mm film supports high-resolution images that can assist in forensic examination and presentations in court. It enables better handling of various lighting conditions that could be present at a fire scene, ensuring that critical details are captured.

Other film speeds noted in the choices support specific uses and scenarios, but 35mm as a film size encompasses a range of ISO settings, making it a practical decision for comprehensive documentation in fire investigation.