Suppose if I have two identical camera bodies. One is mounted to a 100mm f/4 prime and the other a 50mm f/4 prime lens. Despite them having the same f -stop (40), the 100mm will have a larger aperture opening: 100/4=25mm, while 50/4=12.4mm. So does this mean that the camera with the 100mm lens will have more light hitting its sensor? If so, does this mean I can choose a faster shutter speed with the 100mm lens, while maintaining all other factors constant?