In my different forms of photography there can be a vast range of exposure times used. For instance, in the solargraph image above the total exposure time is 6 months, or around 16 million seconds (16 x 10^6 seconds). The colliding water drop image, taken using an ultra high speed flashgun, has an exposure time of just 10 microseconds or 1 x 10^-5 seconds. The total range of exposure times from the shortest I do to the longest is therefore an almost unimaginable factor of 1.6 x 10^12!