Shutter speed examples

Below are two photographs taken at different shutter speeds, the ISO was set to 100 and the aperture to f3.5. The top photograph is taken at a 1 second shutter speed and the bottom photograph is taken at 1/4 of a second.

You can see quite clearly that the top photograph is brighter than the bottom photograph and this is due to the fact that the extra length of time the shutter was open for has allowed more light onto the sensor. I will post some more shutter speed photos later showing movement.