Lighting Notes

To understand exposure, you need to accept that overexposing and underexposing are key elements when it comes to lighting in photography.  There are different situations that require you to overexpose or underexpose.  You should overexpose a photo if what you are shooting is dark in comparison to the background, you are shooting in snow, and if you're subject is in shadow in a bright area.  You should underexpose if you're subject is light compared to the background, and to create a sillhoutte.