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线话英语|2010-06-18 15:11:06

 

Transcript: Advanced Digital Camera Features

So you've snapped loads of digital photos with your camera, but somehow they just don't come out as brilliant and sharp as you want them to. Instead of giving up, there are some simple steps you can take to make sure you get the shots you want.
 

Camera Software

Most digital cameras come with software that will allow you to crop, color, or adjust the contrast of your photos after you've taken them. These changes can improve quality in a flash. But there are also things you should do before you take the pictures. Shutter speeds and aperture controls are two of the most effective ways you can make a picture your own and improve its quality.
 

Shutter Speed

Shutter speed controls light and motion. Slower shutter speeds let more light in, creating a lighter image. With faster shutter speeds you get less light, and a darker image. Also, the faster the shutter speed, the sharper the image will be. In contrast, the slower settings will produce more blurry photos. So, if you're taking pictures of fast moving subjects, like you would at a sporting event, you'll probably want a faster shutter speed. When in doubt you should pick a medium shutter speed, about 1/60 seconds or faster. But, in order to adjust your shutter speeds, you have to switch your camera to shutter priority or manual mode.
 

Aperture

The aperture is also a very important setting on your digital camera. It adjusts the size of the opening in the lens. As it changes size, it affects both the light of the image and the depth. Like the shutter speed, the aperture can be opened up to let in more light or closed for less. It also affects the sharpness of your photo like the shutter, but in a different way. Basically, it can make your background clearer or blurrier. For example, if you're shooting a landscape you may want a smaller aperture so everything in your background and foreground is sharp. But with a portrait, you may want a larger aperture. It will decrease the depth so the face is sharp, but the background is soft and out of focus. For general shooting you should select a medium aperture, a setting of f/5.6 or smaller. In order to adjust your aperture, make sure your camera is switched to aperture priority or manual mode.
 

Digital Camera Lenses

Selecting the proper lens is also important. To take phenomenal pictures of flowers or objects close up, you should select the macro lenses. Macro lenses focus on objects closest to the lens. The macro lens is usually expressed as a ratio. For example, with a 1:1 lens, the object appears life-sized in the picture. A 2:1 macro lens doubles the object's size. You may also see it as a number such as + 10. The higher the number, the more magnified your object will be.
 

Telephoto Lens

Telephoto lenses will also give you stunning close-ups, but of objects far away, like wildlife or your daughter playing soccer. Anything longer than 70 millimeters is considered telephoto. These lenses compress space, so the larger the lens, the closer the objects in the image appear to one another.
 

Wide Angle Lens

If you are shooting landscapes or cityscapes, choose a wide-angle lens. These allow you to capture more without having to move farther away. Anything smaller than 35 millimeters is a wide angle. Essentially, the smaller the number, the wider the angle and the more you capture.
 

Other Digital Camera Features

A couple of other quick tips, turn on the flash when someone's face is shadowed to try and fill out the light, and turn it off when you're at your son's piano recital. The flash will only help you light up objects within eight feet of the camera. When in doubt, read through your camera's manual, set your camera to fully automatic, and remember you can always crop, color, and adjust the images on your computer afterwards.
 

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