C-130 photographic aircraft from the cockpit of another C-130 during a formation flying session (I could not see the trail aircraft from where I was in the cockpit).

This was our second time in close trail. We got what looked like 40 feet (or closer) from the rear cargo ramp. There is a third C-130 that joined our formation at this point and was also in trail, but I couldn't see it from my place in the cockpit and the closest I got to photographing it in formation (I got a distance picture) was a picture of our plane's engine...