How Digital Photography Works
An electri- cal field in the depletion layer pulls electrons out of the P-layer, accelerating them into the N- layer. It moves h ...
Even the most elaborate exposure system begins with a tiny device called a photodiode orphotovoltaic cell. It’s a specialized fo ...
Less-expensive digital cameras—called point-and-shoot (POS) models—often have only one of the many ways of measuring light that ...
This occurs because exposure systems think that no mat- ter how bright or how dim something is, it is 18% gray (which is conside ...
How Digicams Juggle Exposure and Creativity In the few seconds it takes to snap a picture, there is a windstorm of activity as d ...
Photodiodes catch light from the subject of the photo-to-be. Those photodiodes churn the ethereal light into thin currents of el ...
The digital processor’s job of finessing aperture and shutter settings is simplified by the use of exposure values (EVs). These ...
Exposure equivalences are the basis of a common feature among digital—and film—cameras: exposure modes. The photographer chooses ...
76 PART 2 HOW DIGITAL CAMERAS CAPTURE IMAGES How Digital Photographers Remain Masters of Their Domains Despite the sophisticatio ...
CHAPTER 5 HOW DIGITAL EXPOSURE SIFTS, MEASURES, AND SLICES LIGHT 77 How Photographers Get in the Zone How does even an experienc ...
How Digital Cameras Create a Whiter Shade of White Eyes do only half the work of seeing. They generate a lot of nerve impulses i ...
Of these temperatures, the ones most commonly affecting photography are the temperatures of outside light, ranging around 5500K, ...
80 PART 2 HOW DIGITAL CAMERAS CAPTURE IMAGES How Speed Creates Noisy Pictures We’ve all driven through the night, trying to tune ...
CHAPTER 5 HOW DIGITAL EXPOSURE SIFTS, MEASURES, AND SLICES LIGHT 81 Signal noise is the noise that’s inherent to all imaging and ...
How Histograms Run the Gamut The signature look of Ansel Adams’s photographs is the rich, dimensional details that fill every in ...
Inadequate range also causes details to wash out in light areas. Here, overexposure is docu- mented by a histogram in which the ...
84 PART 2 HOW DIGITAL CAMERAS CAPTURE IMAGES CHAPTER 6 How Technology Lets There Be Light ...
I was quite a purist about it and when some of the people came in and began to use flash I thought it was immoral. Ben Shahn PHO ...
How Electronic Flash Works Whether those flashing lights are from the small flash built into point-and-shoot cameras, a professi ...
CHAPTER 6 HOW TECHNOLOGY LETS THERE BE LIGHT^87 When you press the camera’s shutter button, the camera nor- mally waits until th ...
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