I cannot come up with a better term for now. Exposure is a slightly technicall word for taking a picture and thereby it is meant the film or digital media used will be exposed to the light emanating from the original image. This in return will create a "record" on the media. The word exposure is technically parallel to aperature size used. An over exposure is when the image is too bright and under exposure the opposite. However one can also use the word as in the field of exposure which simply means the area of the image which one chooses to take a picture off.