Camera controls

Question 1

aperture

Answer 1

• a control that allows control of the amount of light passing through the lens into the camera
• the wider the aperture the smaller the f number and the more light can pass through
• each increase is known as a stop
• small f number can make image soft, larger f number can make it sharp although to large diffraction occurs
• changing the aperture affects the depth of field

Question 2

Depth of field

Answer 2

how much of the images foreground or background is in focus

• high dof= most of the picture is in focus
• low dof= focusing on is pin sharp but the rest of the image/ background is blurred

Question 3

shutter speed

Answer 3

• ensures that the camera is only exposed to light for a certain period of time
• the longer the shutter speed is open for the more light that hits the camera sensor
• by doubling the amount, we increase exposure by a stop
• short shutter speed= freeze action
• longer shutter speed= blurs moving objects (motion blur)

Question 4

exposure

Answer 4

underexposed- duller image rather darken resolve by increasing brightness on photoshop
over exposed- brighter image harder to resolve
- a compromise of aperture and shutter speed will be needed for correct exposure

Question 5

ISO

Answer 5

international organisation of standardisation

• increasing ISO the camera applies amplification to the electrical signal form the sensor
• too high of an ISO can cause the image to become grainy

Question 6

reciprocity

Answer 6

the reciprocity law is the relationship between shutter speed and aperture this applies to ISO also
- doubling the time the shutter remains open or increasing the aperture size by 1 stop will double the exposure (for correct exposure there will need to be a compromise of aperture and shutter speed)