![]() When more or less light reaches the lens from the subject, we need to adjust the exposure. We see and photograph objects by light that is reflected from our subjects, transmitted (say, from translucent objects that are lit from behind), or emitted (by a candle or television screen). ■ Reflected, transmitted, or emitted light. There are four things within our control that affect exposure, listed in "chronological" order (that is, as the light moves from the subject to the sensor): If the range of tones in an image is extensive, embracing both inky black shadows and bright highlights, we often must settle for an exposure that renders most of those tones-but not all-in a way that best suits the photo we want to produce. However, getting the perfect exposure can be tricky, because digital sensors can't capture all the tones we are able to see. Poor exposure can cloak important details in shadow, or wash them out in glare-filled featureless expanses of white. Correct exposure brings out the detail in the areas you want to picture, providing the range of tones and colors you need to create the desired image. Getting a Handle on ExposureĮxposure can make or break your photo. When you finish this chapter, you'll understand most of what you need to know to take photographs in a broad range of situations. This chapter explains the shooting basics of exposure, either as an introduction or as a refresher course, depending on your current level of expertise. ![]() That's why the Digital Rebel XTi is such a versatile tool for creating images. If you want absolute creative control over any of these functions, you can set them manually, too. Or, you can opt to fine-tune how the XTi applies its automatic settings. You can choose to let the camera set any or all of these for you automatically. These include exposure, sensitivity ( ISO settings), color balance, focus, and image parameters like sharpness and contrast. The Canon EOS Digital Rebel XTi gives you complete control over many of the basic functions of the camera.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |