This week we are starting with some simple terminology that will
greatly affect how you go about taking any photo. It doesn’t mater
what kind of camera you have the same principles apply.
Shutter speed
– the length of time the shutter is open for. The longer it is open
the more light is let in which is preferable in poor light conditions,
however this will increase the chance of blur in the photo.
Aperture
– is the size of the hole in the lens that lets light into the camera.
Aperture affects the depth of field of a photograph. A small hole will
concentrate the rays of light hitting the sensor/film and so more of
the photo will be in focus creating a large depth of field.
Focal Length
- measurement that determines the magnification and field of view of a
lens. This will be in millimeters on SLR cameras and zoom on compact
digital. 3X zoom is equivalent to 35 – 105mm. Focal length over 100mm
is considered telephoto.
Depth of field - the distance in front of and behind the subject that appears to be in focus.

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