Exposure in Photography

Exposure in Photography

By Elizabeth Pike

What is exposure?

in photography.....

Exposure is the amount of light that reaches your camera's sensor, creating visual data over a period of time.

​underexposed: too little light

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​correctly exposed: just the right amount of light

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​overexposed: too much light

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so exposure is....

in photography.....

Exposure is the amount of light that reaches your camera's sensor, creating visual data over a period of time.

Multiple Choice

So what is exposure in photography?

• How a camera focuses on a key subject.

• The amount of depth in a photograph.

• The amount of light that reaches the cameras sensor.

• The revelation of an identity.

How do you take a photo with a long exposure?

Exposure is a mix of three important parts when taking a photograph.

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By using the Exposure Triangle

ISO refers to the camera's sensitivity to light. You change change the ISO number in the camera settings.

ISO

​This is how fast or slow the shutter opens and closes on the camera.

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Shutter Speed

It is the size of the opening of the hole which light passes through. (like a pin hole).

​​Aperture

​- Exposure Triangle

ISO

Shutter Speed

Aperture​

Multiple Choice

What are the three parts to the exposure triangle?

• Texture, Line, Space

• Peanut Butter, Jelly, Bread

• ISO, Shutter Speed, Aperture

The measurement for ISO is in increments of 100:

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100, 200, 300, 400, 500, 600, etc....​

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​Some text here about the topic of discussion.

ISO

100 means less sensitive

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800 means more sensitive​

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so the lower the number, the less sensitive

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the higher the number the more sensitive to light​

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​ISO Numbers

The higher the ISO the more light is exposed in the camera sensor.

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the higher the number, the "noisier" the photo is...

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this can be a positive or a negative, depending on the image you want to capture.​

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but....

REMEMBER>>>>>>

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The higher the ISO the more light is exposed in the camera sensor.

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Multiple Select

The higher the ISO number _____________________. (there are two correct answers).

• The clearer the photo is.

• The "Noisier" the photo is.

• The less sensitive the camera is to light.

• The more sensitive the camera is to light.

Aperture

It is the size of the opening of the hole which light passes through. (like a pin hole).

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Aperture

The measurement is called F/stops.

like F/stop 5.6

or F5.6​

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measurement for aperture

• Short depth of field

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• Blurry background​

F/stop 5.6

• long depth of field

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• Clear background​

F/stop 22

Depth of field:

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​Depth of field is the distance between the closest and farthest objects in a photo that appears acceptably sharp

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​Notice the F/stop numbers and the DOF (depth of field) and the picture of the corral on the far right.

The measurement is called F/stops.

like F/stop 5.6

or F5.6​

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REMEMBER:

the measurement for aperture

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Multiple Choice

What measurement is used for aperture?

• metric

• f/stops

• miles

• kilograms

Shutter Speed

This is the speed at which the camera shutter opens and closes.

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Shutter Speed

measured in seconds.

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LIKE 1/5TH OF A SECOND OR 1/225TH OF A SECOND OR 1 SECOND.​

​THE SHUTTER SPEED IS

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Multiple Choice

WHAT MEASUREMENT IS USED TO DETERMINE THE SPEED AT WHICH A CAMERA SHUTTER OPENS AND CLOSES?

• f/STOPS

• MILES

• SECONDS

• EUROS

YOU CAN DETERMINE WHAT IS NEEDED CREATE CREATE CORRECTLY EXPOSED PHOTOS.

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SO AGAIN:

By using the Exposure Triangle