This one isn't quite ready to go; they are still waiting for the Flashbulb.
Several ships in any formation would have cameras in them, generally K-18 Sackmans which took 9-1/2-inch roll film and produced an 8 x 10-inch negative, frame after frame.
Cassettes for the cameras would be loaded by Photo Section, a given number of frames, then a single frame of Dufaycolour film would be taped in, then the remainder of the load for that cassette. The cassette was attached to the Camera, light shields removed and then the film advanced so the first frame was ready to shoot. If the plane did not have a proper Photographer aboard, the Camera would be plugged into the Bomb Distributor, which released the bombs at proper intervals to give the coverage from any altitude that they wanted: faster for closer together, slower for farther apart at any given speed..... which was a part of the programming of the Bomb Distributor.
The Flashbulb was a bomb casing containing an igniter, a barometric or Time fuse and a couple of hundred pounds of Magnesium powder and small chunks. The Flashbulb was slung in the Bomb Bay of the aircraft, shackled in and attached to its Tether.
On the bomb run, the Pilot handed over control to the Bombardier, whose job was to trip the START button on the Bomb Distributor. That released the first bomb..... and others followed as the Distributor released them in order to make the pattern and bomb density which had been decided upon. When it came time for the Flashbulb to be released, it yanked on its Tether as it fell free of the Bomb Shackles and that started the Camera. The Camera then took pictures on Black-and-White film (generally Kodak Double-X Panchromatic) until it had gone through its load.
At some point, accurately determined, the Flashbulb would erupt with several hundred million candlepower of light, lighting up the ground beneath the airplane perfectly and enabling excellent night shots to be produced. The single frame of very expensive Dufaycolour would record what was burning in the Target Zone; analysis of this frame by Colour Analyser and Spectrometer would tell the analysts WHAT was burning and WHERE, enabling a relatively-complete analysis of a given strike to be made within hours of the aircraft landing at home.
My Dad was an Aircraft Instrument Maker and Aircraft Factory Inspector during the latter part of War Two. Prior to that, he had been on Active Service with 133 FS, RCAF and had worked at Number 2 Bombing and Gunnery School at Dafoe, Saskatchewan. About 4 or 5 years ago, going through some of Dad's papers, I found a brand-new Parts Book for a Canadian GE Bomb Distributor. Investigation of some of his instrument data showed me how the thing worked.
For information on the Photo Section and Active Service in the war zone, I have relied on information from RCAF Sgt. Lawrence Stuckey, who was the single most gifted Photographer I have ever known as well as an honest-to-God Hero. Part of his job on PR missions was to hang out of the Bomb Bay while strapped into in a seat, aiming the Sackman as the Bombs fell PAST him on their way to Germany. He made it right through to the end of the War in Photo Section although when I knew him, 25 years later, his hands were still shaking.
What that War did to humans on both sides was obscene.