But digital cameras also have a few disadvantages. A film camera can take a picture almost immediately when you press the button. Digital cameras, on the other hand, can take a few seconds, especially if they're making adjustments automatically. They also require more light than traditional cameras do. Sometimes, the abundant space on a memory card encourages people to take so many pictures that they're not sure what to do with them later.
It is good to remember that a digital camera is a lot like a film
camera, but it uses a sensor and a memory card in place of film. When
you take a picture, a digital shutter opens and exposes the sensor to
light. The sensor reacts to the light, and the memory card stores the resulting picture.
The light that hits the sensor determines virtually everything about the picture. Your camera may be able make some adjustments, but it has to work with the amount and type of light that it receives. You can control how the light hits the sensor with three settings:
The light that hits the sensor determines virtually everything about the picture. Your camera may be able make some adjustments, but it has to work with the amount and type of light that it receives. You can control how the light hits the sensor with three settings:
- The focus adjusts the lens in relation to the sensor, making sure that the light converges on the sensor's surface. Most digital cameras have an automatic focus feature, but a few focus manually and have interchangeable lenses.
- The aperture, measured in f-stops, determines how wide the shutter opens. A wide opening lets in more light, and a narrow opening lets in less. Higher f-stops mean that the opening is smaller, and lower f-stops mean that it is larger. The aperture determines the picture's depth of field, or how much of the picture is in focus. At low f-stops, the foreground of the picture will be in focus while the background is out of focus. At high f-stops, objects in both the foreground and background are in focus.
- The shutter speed determines how long the shutter is open. The longer it's open, the more light will hit the sensor. If you or your subject is moving while the shutter is open, the image will be blurred.
On most cameras,
you can manually adjust the aperture and shutter speed. This can reduce
the amount of time between when you press the button and when the
shutter opens. Most cameras also have a fully automatic
mode that adjusts the settings, including the focus, for you. You can
take lots of good, clear pictures with this mode. Many cameras also have
several presets for capturing portraits, fast action or outdoor scenes.
But automatic exposure might not be best for every situation, so understanding f-stop, shutter speed and presets can make a huge difference in how well your camera works for you. Being able to set the exposure on your own will also let you cut down the amount of time between when you press the bu
Adapted from howstuffworks.com
But automatic exposure might not be best for every situation, so understanding f-stop, shutter speed and presets can make a huge difference in how well your camera works for you. Being able to set the exposure on your own will also let you cut down the amount of time between when you press the bu
On most cameras,
you can manually adjust the aperture and shutter speed. This can reduce
the amount of time between when you press the button and when the
shutter opens. Most cameras also have a fully automatic
mode that adjusts the settings, including the focus, for you. You can
take lots of good, clear pictures with this mode. Many cameras also have
several presets for capturing portraits, fast action or outdoor scenes.
But automatic exposure might not be best for every situation, so understanding f-stop, shutter speed and presets can make a huge difference in how well your camera works for you. Being able to set the exposure on your own will also let you cut down the amount of time between when you press the button and when the shutter opens. In other words, you can take the picture you want before the moment passes. You can learn more about setting exposure by taking several pictures of the same scene using different settings and seeing how the finished product changes.
tton and when the shutter opens. In other
words, you can take the picture you want before the moment passes. You
can learn more about setting exposure by taking several pictures of the
same scene using different settings and seeing how the finished product
changes.But automatic exposure might not be best for every situation, so understanding f-stop, shutter speed and presets can make a huge difference in how well your camera works for you. Being able to set the exposure on your own will also let you cut down the amount of time between when you press the button and when the shutter opens. In other words, you can take the picture you want before the moment passes. You can learn more about setting exposure by taking several pictures of the same scene using different settings and seeing how the finished product changes.
Adapted from howstuffworks.com
