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There are three primary colors of light—red, green, and blue—so what gives with Sony’s four-color “RGB+E” sensor technology? Should you, as a digital SLR owner, worry about it? As with everything related to digital photography, it’s useful to understand what’s going on, even if it doesn’t apply to your own work. Some day, it might. Who knows?

What Sony is doing is refining the traditional Bayer mosaic pattern by adding a fourth color, a sort of cyanish green, that it calls emerald, ostensibly to match the color response of the sensor more closely to the color perception of the human eye. The problem with a red-green-blue matrix is that human eyes have a quirky response to red at certain frequencies. That can be fixed by applying a blue-green subtractive filter to the red channel, but only at those particular frequencies. The emerald filter over some of the photosites in Sony’s RGB+E sensor provides the information used to make that adjustment.

As a result, the RGB+E sensor has 25% red-sensitive pixels, 25% green-sensitive pixels, 25% “emerald”-sensitive pixels, and 25% blue-sensitive pixels, as you can see in Figure 2.9. The emerald-filtered photosites are close enough in response to the green pixels that, under most conditions, the RGB+E sensor responds like a Bayer mosaic (with 25% red, 50% green (actually green+emerald), and 25% blue). After capture, the four-color image is processed and converted back to a traditional threecolor, RGB image, but one Sony says has more accurate colors.

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Digital photography was quickly embraced in several professional fields of endeavor where the cost of $12,000–$30,000 cameras was easily outweighed by the convenience of having digital images instantly. I list these in detail in Mastering Digital Photography, but here’s a quick summary:

• Photojournalism: Newspapers, news magazines, and news Web sites need visuals quickly, and can’t wait for their photographers to fly images back from Afghanistan. Digital images, which could be transmitted by phone lines in the early 1990s, can be zapped across the Internet today, sent by satellite phones, and be ready for publication immediately. However, even if you’re not a pro photojournalist, the speed of access to digital images can be vital. I once took a publicity shot for my kids’ school and had a print to the local newspaper an hour later. Do you need a picture for that presentation you’re giving in one hour? Think like a photojournalist and go digital.
• Portrait photography: Digital technology has been important to professional portrait photographers because it gives them the opportunity to sell prints and enlargements immediately after the sitting, when the customers’ interest is highest. Digital portraits are easier to retouch, too. If you decide to produce portraits of your own family and friends, or need a passport photo quickly, you’ll appreciate digital technology, too.
• Photoillustration: Commercial, corporate, and industrial photographers all have taken to digital photography in a big way. Photoillustration can take many forms. For the amateur photographer, it often involves taking attractive photos of hobby collections, such as model ships or Lladró porcelain. Or, perhaps you’re interested in photographing flowers or animals, or want pictures for your eBay auctions. For catalog work, digital photography has become the way to go because repetitive setups can be shot one after another quickly, and the finished images are immediately ready for placement in a catalog layout.
• Everything else: Although the preceding three fields were the first to adopt digital technology, today every other kind of picture taking is rapidly turning digital. Travel and vacation photography benefit from the ability to reshoot immediately if a picture is not to your liking (rather than schedule a repeat trip back to the Taj Mahal). Family and pet photography thrive on the instant feedback digital photography provides. What better wayto encourage your kids to cooperate for that shooting session than to show them each group of pictures on your camera’s LCD? There aren’t many kinds of photography that won’t be predominated by digital technology in the next few years.

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Owning the right digital photography equipment is necessary whenever you want to make it successfully wether you’re a newbie or a pro. If you are going to become a pro with your digital photography then you had better be ready to spend a fair deal more on kit than simply someone needing to try this as a hobby.

Relying on what you want to do with digital photography it’s totally up to you as to how much gear you are going to be checking out in purchasing. A pro career in digital photography would possibly not be what you are searching for do if you do not have the money for these types of kit that you are going to have to have. On many digital cameras you might be able to even employ them as a manual camera. You’ll simply have to work out how to adjust the whole thing’s operations. You will be able to go out and purchase a book for dummies on digital photography also those are always handy to have.

Just keep in mind that owning the correct software for your digicam is actually serious, it’ll help you arrange all the pictures you have made. You’ll need to get a bag or case to keep your digicam safe and all or any accessories that you will have purchased as well while you are active. Purchase the camera that you’re feeling most closely fits your desires and remember you only need a basic one for amateurs. They are going to have all the features you’ll need solely to get going and with this camera you will even be in a position to take really great pictures.

Spending more doesn’t all the time mean that you are purchasing the better product.

You’ll be able to find a couple of superb deals online if you are desiring to save a little cash, who would’nt like to do that? Or you can ask around, you could have a chum that can help you out with your very first time buying desires. If there is a corner store where you can go in and purchase digital cameras for digital photography there’ll be someone in there that will help you with any questions you might have about the product.

Are you frustrated with not being able to take high-quality photos with your digital camera? Actually you’re just a click away from learning the simple and satisfying tricks used by professionals to take one amazing picture after another: Learn Digital Photography Now!

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