By the Footbridges

The picture to the left is a very over-exposed picture.
Shutter speed = 1/40
Fstop = 5
ISO = 200

The picture on the right is the same picture, but much less exposed.
Shutter speed = 1/40
Fstop = 16
ISO = 200

The picture to the left is very dark.
Shutter Speed = 1/40
Fstop = 14
ISO = 200

The picture to the right is the same as above, but better exposed.
Shutter speed = 1/40
Fstop = 4
ISO - 200