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The Truth About Pixels - Part I: Digital Cameras
Most digital cameras today boast of greater resolution and picture quality. What does that mean to the amateur or occasional photographer? You hear of cameras with 3 megapixals up to 6 or 7 megapixals. What is that? The book that comes with the camera explains all the buttons, bells and whistles, but does not explain megapixels. Most people do not like to work with numbers much, but it is necessary to understand pixels. So here's my attempt to explain pixels. I'll try not to involve too many numbers. To understand pixels, one must first remember the good old days when you took pictures on film and let the development labs worry about pixels. But, they didn't really have to, because the exposed negative just captured the image that was reflected through the lens. It was all there and the only thing that affected quality was the size of the negative. The bigger the negative was, the larger the picture that could be produced. When the world went digital, the pixel was invented. So what is a pixel? If you divided a picture in hundreds of horizontal and vertical lines, you would actually have a large number of little squares that when put together, created the picture. Each square is a pixel. So, when a digital camera says it has 1-megapixel capabilities, it means that the total number of horizontal and vertical squares produced when a picture is taken equals 1 megapixel (1,000,000 pixels). A 3 megapixel camera produces a picture that has 3 million pixels in its makeup. If all the pictures were the same size in each camera, it would be easy to understand why a camera that produces more pixels would be a better quality camera. Here is where the camera makers are not forthcoming with information. What they don't tell you is that as far as I can tell, every digital camera produces pictures that have 72 pixels per inch per picture both horizontal and vertical. The only difference is that a 3 megapixel camera produces a larger picture than a 1 megapixel camera and a 5 megapixel camera produces an even larger picture yet. The reason I say "as far as I can tell" is that I have not tried all cameras or studied the information on all cameras. There may be some out there different, but they probably are not in the amateur photographer's price range. Conclusion: For video uses only, your camera purchase decision should be based on features other than the number of pixels. Wayne Rockwell is a professional videographer at Legacy Pictures to Video and specializes in Video Montage creation and Photo Retouching.
MORE RESOURCES:  Yahoo! News Search Results for photography Yahoo! News Search Results for photography • Photography club posts meetings (MyCentralJersey.com) Bound Brook Memorial Library, 402 E. High St., Bound Brook, will host the Somerset County Photography Club on Tuesday, Jan. 13. This meeting will be devoted to a competition, including slides and digital images as well as prints. Visitors are invited, but only members may enter the competition. • PHOTOGRAPHY: The best of Island Packet staff photographer Jay Karr (Island Pa... I?ve been taking pictures for the Island Packet for the last 18 years. I grew up in Fulton, Missouri, getting into photography in his high school?s publications class. I remember at the time feeling the pressure of having to come up with an occupation to prepare for in college and the relief I felt when I realized you can have a career as a photographer. Though my bachelor?s degree is in ... • PHOTOGRAPHY: The best of Island Packet staff photographer Sarah Welliver (Isl... Before joining The Island Packet in October, Welliver spent time as a photography intern at the Sioux Falls (S.D.) Argus Leader, the Detroit Free Press and The Santa Fe New Mexican. Her photographs have been featured in publications including the Marine Corps Times, Wall Street Journal Online and PDNedu magazine. She graduated from the University of Montana in 2007. • A Literacy of Images: Nancy Newhall and the Art of Photography (The Jewish Jo... Best known for writing text to accompany the photographs of Ansel Adams and Edward Weston, Nancy Newhall was also a widely published writer on photography, conservation, and American culture. • The Sony World Photography Awards and Photographer Delly Carr Put Football Ga... Have you got what it takes to be the next Heinz Kluetmeier? The Sony World Photography Awards -- the global competition which honours photographers -- is looking for budding amateur photography to be submitted to the 2009 Sony Campaign Award. |
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