Photography

1
Photography

• Parts of a Camera

2
Aperture

• size (or width or diameter) of the opening of a
  lens diaphragm inside a photographic lens
• regulates the amount of light that passes through
  the lens onto the film inside the camera
• Represented by f-stop numbers, the lower the
  number, the larger the opening.

3
Depth of Field

• Measures the distance between the closest and
  farthest object in focus when taking a photo.
• Measurement is opposite of the aperture.
• Big aperture small depth of field
• Small aperture big depth of field
• For detail shots you want a small depth of field
• For pattern/framing/rule of third shots, you want
  a big depth of field.

4
Big Aperture Small Depth of Field

• What is in the background? Clear or blurred?

5
Small Aperture- Large Depth of Field
6
Shutter Speed

• The length of time that the camera's shutter is
  open usually ranging from 1/8000 of a second to
  30 seconds long.
• Slow- objects in motion as a blur
• Fast- more precise moving objects

7
Slow Shutter Speed
8
Fast Shutter Speed
9
Review

• Aperture is the size of the lens opening that
  lets in the light. The bigger the lens opening,
  the more color gets in, but the shorter distance
  will be in focus.
• Shutter speed is how long the light is let in
  through the lens opening. The slower the shutter
  opens and closes, the more light comes in. For
  moving objects, a slow shutter will blur the
  motion.

10
Program Mode

• Action mode/firework mode faster shutter
• Portrait mode slower shutter, bigger aperture
• Landscape mode smaller aperture

11
Zoom

• Optical Zoom-
• Uses a lens to make objects appear bigger. This
  zoom will keep the quality of the photo.

• Digital Zoom-
• Uses cutting and enlarging of photos to make the
  picture appear larger in a camera. This zoom will
  lessen the quality of the photo.

12
JPG

• Joint Photographic Experts Group
• Compression format for digital images

13
Pixel

• Method of measuring and comparing the maximum
  image size capabilities of digital cameras
• The higher the pixel count, the better and larger
  the image
• 1 megapixel 1 million pixels

14
Resolution

• In digital imaging, refers to the number of
  pixels or dots that make up an image an images
  resolution must be high for it to be presented
  clear.
• Higher resolutions take up more card memory
• Resolutions must be 150 to be in the yearbook.

15
Why cant we use Facebook or phone photos?

• Websites require a 72 resolution to look clear.
  Print requires a 150 resolution to be clear.
• RESOLUTION AND IMAGE SIZE ARE DIRECTLY RELATED.
• What happens to the resolution of a 3x5 photo
  when we make it an 8x10?
• If may camera takes 36 inch x 48 inch photos at a
  72 resolution, what happens when I shrink the
  photo to an 8 x 10?

16
Shutter speed and Aperture?
17
Shutter Speed Aperture
18
Shutter speed and aperture
19
Assignment

• Go to webshots.com
• Find the following
• Five fast shutter speed photos
• Five slow shutter speed photos
• Five big aperture (small depth of field) photos
• Five small aperture (big depth of field) photos
• Take screen shots by pressing shiftcommand4 on
  the key board.