Digital Photography

DIGITAL PHOTOGRAPHY

INTRODUCTION

Aperture

• Referred  to the lens diaphragm opening inside a photographic lenses.
• The size of the diaphragm opening in a camera lens regulates amount of light passes through onto the film inside the camera.
• Calibrated in f-number or f-stops. f/64, f/32, f/22, f/16, f/8.0, f/5.6, f/2.8, f/1.8
• Large aperture will decrease depth of field while small aperture will give you larger depth of field

Shutter Speed

• Also known as “exposure time”, stands for the length of time a camera shutter is open to expose light into the camera sensor
• If the shutter speed is fast, it can help to freeze action completely.
• The aperture diaphragm of a lens (bigger or smaller values) and timing (open and close) of the camera's shutter curtain (BOTH).
• 1/8000, 1/4000, 1/1000, 1/500, 1/250, 1/125, 1/60, 1/30, 1/15, 1/8, 1/4, 1/2, 1 or -1, -2 etc. are essentially indicators of the duration (timing) at which the shutter curtain opens up and closes during an exposure process.
• A 1/125 setting means the shutter curtain open and close within one hundred and twenty five of a second while 1 means an one full-second the shutter opens up during exposure to absorb the available light source onto the film to form an exposure.

ISO

• ISO is level of sensitivity of image sensor.
• The lower the number the less sensitive your camera is to light and the finer the grain/noise.
• Measured in numbers ISO 100, ISO 200, ISO 400, ISO 800, ISO 1600, ISO 3200.
• ISO 100 and ISO 200 is a base ISO.
• You should increase the ISO when there is not enough light, when there is plenty of light you should always use the number of base ISO.

Aperture

 f 3.5

 f 6.3

 f 10

 f 16

 f 20

f 22

ISO

 100

 200

 400

 800

 1600

6400

Shutter Speed

1.5

1.40

1.60

1.100

 1.125

1.160

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