How to make an Exposure

The Trinity and Beyond

White Balance

• AWB-auto white balance• Daylight• Shade• Cloudy• Tungsten• Flourescent• Flash• Custom

The Trinity-Aperture

• Controls how large the opening is that lets light through to the sensor

• Called f-stops• Full stops

– 1,1.4, 1.8, 2.0, 2.8, 3.5, 4, 5.6, 8, 11, 16, 22,32

• Controls depth if field• The higher the number the smaller the aperture hole

is• The higher the number the more depth of field• To change the aperture press the AV button while

scrolling with the main dial

Depth of Field

The Trinity-Shutter Speed

• Controls how long light passes through to the sensor• Change shutter speed with main dial• Can be anywhere from 1/4000 second to 1 second to

minutes• 1/500=one five hundredth of a second• 1” = one second• Anything under 1/60 will have motion blur from your

hands shaking (called camera shake) • Bulb setting-shutter stays open as long as you press

the button

Fast Shutter Speed

Slow Shutter Speed

ISO

• Controls how sensitive your sensor is• Runs in multiples

– 50, 100, 200, 400, 800, 1600, 3200

• 100-400 for bright light• 400-800 for less light• 1600 for very dark situations

– After 800 you begin to have lots of noise

• Your ISO will affect the choices of aperture and shutter speed available to you

• A higher ISO will allow you to use faster shutter speed

Add all three and you have an Exposure

• Now we have to combine all three to make our exposure

• Set your white balance

• Set your ISO

• Make choices about aperture and shutter and use your light meter to get the correct exposure

Light Meter• Measures the light coming into the camera• This measurement allows you to choose the

correct aperture and shutter speed• Press the shutter release half way down to get a

light meter reading• The goal is to get the blinking bar in the center of

the light meter bar• Choose a aperture or shutter speed that you want

to start with and then then scroll with the other (aperture or shutter speed)until you have the bar in the middle

Underexposed Overexposed

Summary of Making an Exposure

• Set your white balance• Set your ISO• Choose your shutter speed or aperture• Use your light meter to get the

corresponding shutter speed or aperture• Take the photo and check your LCD to

see if it is properly exposed