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Basics of PHOTOGRAPHY

Understanding Exposure

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Page 1: Understanding Exposure

Basics of PHOTOGRAPHY

Page 2: Understanding Exposure

Good Picture – Correct Exposure

ApertureControls the Amount of Light Entering the

Camera Through the Aperture or the Iris of the Camera Lens and Falling on the Camera Sensor.

Page 3: Understanding Exposure

Good Picture – Correct Exposure

Exposure Controlled by 3 Components

Aperture

Shutter Speed

ISO

Page 4: Understanding Exposure

Good Picture – Correct Exposure

ApertureThe aperture of the camera behaves exactly in

the same way the iris of our eyes do.

When there is too much light the iris becomes SMALL or closes up

When there is less light the iris enlarges or OPENS UP

Page 5: Understanding Exposure

Good Picture – Correct ExposureAperture

Very Sunny - Small iris – Higher the Number

Low Light – iris opens up – Lower the Number

Page 6: Understanding Exposure

Composition/Framing – Depth of Field

Page 7: Understanding Exposure

Composition/Framing – Depth of Field

• When the background is out of focus

• For 2 reasons• The focus is on the object in the front• And the Aperture is fully open, ie the light is

low or the light entering the camera is less because of the settings you have chosen.

Page 8: Understanding Exposure

Composition/Framing – Depth of Field

Page 9: Understanding Exposure

Depth Of Field

F 22- Deep DoFF 4.2- Shallow DoF

Page 10: Understanding Exposure

Good Picture – Correct Exposure

Shutter SpeedThe Speed at which the Shutter of the Camera

Opens and Closes.

It controls the amount of time the light gets to fall on/read by the sensor.

Page 11: Understanding Exposure

Good Picture – Correct Exposure

Shutter SpeedA High Shutter Speed is Used for

Fast Moving Subjects/Objects

Page 12: Understanding Exposure

Good Picture – Correct Exposure

High Shutter SpeedA High Shutter Speed is Used for

Fast Moving Subjects/Obj

ects

Page 13: Understanding Exposure

Good Picture – Correct Exposure

High Shutter SpeedA High Shutter Speed is Used for

Fast Moving Subjects/Obj

ects

Page 14: Understanding Exposure

Good Picture – Correct Exposure

Shutter SpeedA Slow Shutter Speed is Used

When the Light is LOWOr

When a Blurry Effect is Desired

Page 15: Understanding Exposure

Good Picture – Correct Exposure

Shutter SpeedA Slow Shutter Speed is Used

When the Light is LOW

OrWhen a Blurry

Effect is Desired

Page 16: Understanding Exposure

Good Picture – Correct Exposure

Shutter SpeedA Slow Shutter Speed is Used

When the Light is LOW

OrWhen a Blurry

Effect is Desired

Page 17: Understanding Exposure

For Example – if you speed up your shutter speed one stop (from 1/125th to 1/250th) you’re effectively letting half as much light into your camera. To compensate for this, you’ll need to increase your aperture one stop (from F16 to F11). The other alternative would be to choose a more light sensitive ISO.

Shutter Speed or any of the other variables of exposure cannot be used in isolation

The 3 Elements of Exposure

Page 18: Understanding Exposure

Good Picture – Correct Exposure

ISOISO helps the camera Sensor to be more or less

sensitive to light.

Usually a Higher ISO is used when the Light is Low.

Note – Higher the ISO, grainier the picture.

Page 19: Understanding Exposure

The 3 Elements of Exposure ISO

Page 20: Understanding Exposure

100 ISO 3200 ISO

The 3 Elements of Exposure ISO

Page 21: Understanding Exposure

The 3 Elements of Exposure ISO

When Choosing the ISO setting ask yourself:

1. LIGHT – Is the subject well lit?2. GRAIN – Do I want a grainy shot or one without noise?3. TRIPOD – Am I using a tripod?4. MOVING Subject – Is my subject moving or stationary?

1. If there is plenty of light, 2. I want little grain, 3. I’m using a tripod and 4. my subject is stationary – I will use a low ISO rating.