As we all know the RB67 lenses have a fastest exposure of 1/400 second (unless there are some lenses that I haven't come across yet). I am very fortunate to be able to take launch pictures of the Shuttle from the same location as the press photographers. I am 3.2 miles from the pad. So far I have been using my DSLR with good results. For a daytime launch the settings are usually ISO200, f/8 or f/11 with a shutter speed of 1/1000 of second. I also use a 600mm lens. For the next launch I would like to use my RB67 instead. I have a 360mm lens and a 2X teleconverter if needed. I have some ASA800 fujicolor film which should allow me to set the shutter speed at 1/250 at f/8 or I could set at 1/400 at an aperture of f/4 or f/5.6.Does this make sense? My concern is that even at 1/400 second, and with the shuttle accelerating so quickly, that I might still get an unsharp/blurred picture. I will say this. In the first few seconds after fuel ignition the rocket does lift off comparatively slowly which should help me. With the DSLR I shoot at 8 fps in machine gun fashion. This time I want to get a picture that I can really enlarge and be able to see the shuttle, the booster rockets and the launch superstructure in great detail. Perhaps I need to concentrate on the launch as it is clearing the tower rather than 6 or 7 seconds later when the acceleration is eye-popping. By the way, I do have a power winder which will help me take some fairly rapid shots. Nowhere near 8 fps, but perhaps one every second or two. I know that the RB67 is not really designed for this type of photography, but perhaps someone out there may have had some similar experience. Suggestions welcome.