Aperture, Shutter Speed and Depth of Field

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PHOTOGRAPHY Introduction to: Aperture, Depth of Field & Shutter Speed

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Transcript of Aperture, Shutter Speed and Depth of Field

Page 1: Aperture, Shutter Speed and Depth of Field

PHOTOGRAPHYIntroduction to: Aperture, Depth of Field & Shutter Speed

Page 2: Aperture, Shutter Speed and Depth of Field

WHAT IS APERTURE?

• The aperture is the size of the lens opening

• It controls the amount of light that is let in:

• A larger aperture lets in more light

• A smaller aperture lets in less light

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APERTURE

• The smaller the f/number, the larger the opening

• The larger the f/number, the smaller the opening

f = Sign for apertureThe F word!

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IMPORTANCE OF APERTUREHow can it change what your picture looks like?

A larger aperture (lower f/number) will have your subject in focus, and everything in front of and behind it blurry.

A smaller aperture (higher f/number) will have your subject in focus and everything in front of and behind it quite focused as well.

Also known as Depth of Field

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DEPTH OF FIELD

Large aperture = Shallow depth of Field Small aperture = Large depth of Field

• Large depth of field = much of the image is sharp and in focus.

• Shallow depth of field = only a small part of the image is sharp and in focus.

There are three things which can change the depth of field:

1. The aperture

2. The focal length of the lens used

3. How near the subject focussed on is to the camera

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SHUTTER SPEED

• It's how long the sensor/film in the camera is exposed to light

• Shutter Speeds:

½ ¼ 1/8 1/15 1/30 1/60 1/125

• This depends on how much light there is

• If the shutter is open too long, the picture will be too bright, and if it's not open long enough, the scene will be too dark

Also known as Exposure

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EXPOSUREExposure

= Total amount of light which hits the film

This is controlled by both the aperture & shutter speed

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REVIEW

What have we learnt?

• Aperture use = f sign

• Depth of field = focus of the image

• Use of shutter speed = fractions

• Exposure = total amount of light

They all connect!