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How to Do Everything with Your Digital Camera
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FIGURE 1-1
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Older cameras with CMOS sensors typically offered lower image quality than those with CCDs
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Today, most digital cameras capture anywhere from 2 to 33 megapixels, with a few 4- and 5-megapixel cameras tempting more serious photographers Some high-end cameras capture even more pixels as many as 6 million Why the fuss over pixels Well, as I alluded to earlier, the more pixels you have, the sharper your image is, and consequently the larger it can be printed If you d like to print a digital photo at 8 10 or larger, for instance, a VGA or one-megapixel camera simply won t cut it each pixel would be the size of a postage stamp Take a look at Color Figure 1-1, the first figure in this book s color insert On the left is a detail from a picture taken at 640 480 pixels On the right is the same detail, but it s cropped from a 33-megapixel image As you can see, the smaller image has fewer pixels to work with, and that s why it looks so grainy Obviously, you need lots of pixels to print pictures at a large size, and that s why each year we see larger-resolution digital cameras hitting store shelves
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And there s no end in sight, at least for a while The goal of most camera manufacturers has traditionally been to elevate the resolution of digicams to that which you can get from an ordinary film camera But not all film cameras are the same, and serious photographers always want more resolution More resolution or more pixels per picture allows photographers to blow up images to larger sizes and to crop images and enlarge just one small section of a photo without sacrificing resolution as well Some medium-format cameras, for instance, shoot negatives that are bigger than ordinary 35mm prints you can print a medium-format shot on a billboard That s impossible with any digital camera made today
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CHAPTER 1: Welcome to the Future
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On the other hand, most of us never make prints larger than about 8 10-inches, and that means today s crop of 33-megapixel cameras are good enough But if you want larger pictures like 11 17 or 13 19 (well within the ability of some desktop inkjet printers) you need more pixels Or, you might want to change the composition of a digital image by cropping away a lot of unwanted pixels, and then print the resulting image as an 8 10 You ll need to start with a larger image, such as a 4- 5-, or 6-megapixel, to get good results See The whole issue of resolution can get a bit complicated A few top-of-the-line, pro-level digicams can generate 6-megapixel images Photographers consider that an important number because that s the resolution generally associated with 35mm cameras It s hard to pin down the exact resolution of 35mm SLRs because it varies depending on the choice of film, lens, and lighting conditions, but 6 megapixels is a good estimate Unlike film cameras, digital cameras have no resolution limits All 35mm SLRs use the same size negative, but digital camera resolution can go up each time a new model packs more pixels onto the CCD So while it would be great to take a wall-sized picture with your 35mm SLR, that s simply impossible, even if you go out and buy a more expensive camera 35mm slides and negatives are far too small; if you enlarge them, the grains start to become readily visible once you get past 8 10-inch prints The only way to get larger prints is to start with a larger negative, and that means switching to medium- or large-format photography an entirely different kind of camera So what s next No major camera makers have yet announced 8- or 10-megapixel cameras, but it s probably just a matter of time Actually, I suspect that digital camera development may finally be starting to slow down; most of us average shooters are reasonably happy with 3-megapixel cameras, and even most pros will be satisfied with 6-megapixel models Eventually, though, specialty digital cameras will no doubt come in resolutions that allow photographers to work with huge prints like those from large-format cameras In the meantime, we re seeing another trend in digital photography: satisfying traditional film photographers Right now, the main kind of digicam is the point and shoot model Point and shoot digital cameras appeal to casual and even some advanced photographers They look like 35mm point and shoot models (see Figure 1-2) and automate most of the features needed to take pictures SLR digital cameras are getting more popular all the time These cameras are aimed at serious photographers Models like the Nikon D1H and the Canon D30 feature interchangeable lenses, powerful flash units, and a wealth of manual controls In a nutshell, they work and behave just like SLRs from the film world If you have a trusty old SLR and want a digital camera that s just like it, this is a good time to be getting into digital Only a year or two ago, the price of these pro-oriented cameras were $5,000 and beyond Right now, I can find the Canon D30 for $2,000 and the Nikon D1H for $3,000 at wwwpricegrabbercom, and the prices will no doubt be even lower in a year Olympus sells the e10, a clever SLR-like camera that offers professional controls but doesn t include interchangeable lenses, and that camera is available for just $1,300 As digital cameras get ever more popular, we ll see more of these SLR-style cameras that give photographers all the power and flexibility of SLR cameras with the immediacy of the digital medium, and their prices should drop rapidly In the first edition of this book, when such cameras were still selling for $5,000,
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