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.

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

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

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SO AGAIN:

By using the Exposure Triangle