In case you want to operate a fireball patrol camera, you will need a wide angle lens, or even better, a fish eye lens. Depending on the conditions (moon, haze, city lights etc.) you may use medium-sensitive films (say, ISO 200/24) and expose for 1 to 6 hours. In the case of fireball patrol you should do as many observations as possible, even when the sky is partially cloudy, because bright fireballs are very rare events. Of course, such a patrol is most useful if organized in a kind of network with a number of participating stations separated by some tens of kilometers, like the European Network, because this allows to make measurements of the firebll trajectories and to determine the location in case of a possible meteorite fall. Details about the setup of a network and the analysis of double station photographs are also included in IMO's Photographic Handbook.