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Terms in this set (24)

1. Body - The light tight box

2. Lens - Focuses the image in the viewfinder
and on the sensor.

3. Lens elements - The optical glass lens
components that produce the image

4. Focusing ring - Turning the ring focuses
the image by adjusting the distance of the
lens from the sensor.

5. Diaphragm - A circle of overlapping
leaves inside the lens that adjust the size
of the aperture.

6. Aperture ring or button - Turning a
command dial controls the size of the

7. Mirror - The mirror reflects light from
the lens upward onto the viewing screen.
During an exposure, the mirror swings
out of the way so light can pass straight
through to the sensor.

8. Viewing screen - Ground glass surface on
which the focused image appears.

9. Pentaprism - A five sided optical device
that reflects the image from the viewing
screen into the viewfinder.

10. Metering cell - Measures the brightness
of the scene being photographed.

11. Viewfinder eyepiece - A window through
which the image from the pentaprism is

12. Shutter - Pressing the shutter release opens
the and closes the shutter to let in a measured
amount of light to reach the sensor.

13. Sensor - A CCD or CMOS chip comprising
of millions of light sensitive cells called
pixels. Each pixel has a photosite that
record the image.

14. Data panel - A display the shows exposure
information, ISO, White balance settings,
and the number of exposures left on the
memory card.

15. Command dial - Selects the shutter speed.

16. Hot Shoe - Attaches an external flash unit
to your camera.

17. Mode dial - Allows you to select
exposure modes.

18. Cable connections - Plug-ins for usb,
audio, external power, and monitor.

19. Memory card - Stores image files. May be
erased and reused. Capacity varies.
The exposure compensation control

A feature in your camera that allows you to adjust exposure without having to adjust shutter
speeds and apertures.

The auto, program, aperture-priority, shutter-priority, and manual exposure

Auto mode- sets both aperture and shutter speed for you. This will allow you to concentrate on
composition, lighting and action.

Program mode- sets the shutter speed and aperture just like auto mode, but also gives you access to more settings then you can access in Auto mode. Some cameras have a Program shift feature that allows you to cycle through a series of aperture/shutter speed combinations that offer equivalent
exposures. By choosing the right combination you can choose to emphasize depth of field
or capture motion.

Preset Exposure modes - are fully automatic, but each is designed for a specific situation such
as portraits, landscapes, night scenes, panoramas, and movies.

Shutter-priority mode - allows you to choose the shutter speed and the camera automatically sets
the aperture. Select this mode when you want to control the appearance of motion. You can select
a fast shutter speed to freeze the action or a slow shutter speed to blur it.

Aperture-priority mode allow you to select the aperture and the camera automatically sets the
shutter speed. Select this mode when control of depth of field is important. Select a small aperture
to make everything in your image sharp such as in a landscape. To keep the subject sharp
and blur out the background, select a large aperture.

Manual exposure mode - allows you to set both shutter speed and aperture. Select this mode
when the other modes cannot give you the results you want or when using studio lighting.