How are Camera Lenses Measured

When people buy a Digital Camera, which often forget or ignore the camera 's important part: the lenses. These are the camera lens cameras digital "eyes ". Lens determine how and what the camera will see, as he will see it and how good the vision is passed to the camera 's sensor chip for recording. For me, the camera lens are like paintbrushes; school courses, outline, small details and all the brushes brushes effect. There are a lot of things to learn from the lenses and digital SLR cameras article will give you a basic framework for understanding them. The next sections will not explain basic types used in digital SLR lenses, how they work, also to select them. Focal Length: In a digital SLR camera, it measures the distance the lens and the sensor, measured in millimeters. The lenses can be divided into sub-groups: wide angle, prime, macro, zoom lenses and telephoto. Thelens are evaluated with respect speed or f-stop. An example is a lens of 80 mm and 1.4F a F2.0 50mm. We will explain more this part of the article. Prime Lens: lens are focal fixed: a 50mm 1.4f lens. In order to expand with these lenses, you must use your feet and reach farther or closer to the subject. Usually the prime lenses are faster and sharper then the zoom lens. For people on a budget, they can buy some good lenses used more forcefully eBay store or the local municipality. Macro: are seen as detail brushes. These allow the photographer to get close and personal to the subject. The macro lenses are used in extreme close-ups and small objects like coins generally, daisies, or food, but are not limited by such matters. Some examples include 100 millimeters and 50 millimeters macros. Also they are great in pictures that are types of selective focus. Wide-angle: These are seen as brushes unexpectedly, its focal length is good because it has a visual effect described to "push " the subject away from the photographer and make it look smaller. There is a problem with these wide angle lenses, and this is also known as convergence, which is a distortion that causes some vertical structures to appear as leaning toward the center of your frame. Examples include: 17mm, 28mm, 15mm or 24 mm lens. Normal Lenses: These entities try to copy as the human eye is to see and are also extremely versatile. They are all brushes effect in some in the range of wide angle and telephoto. Normal lenses: 65mm, 50mm, 35mm, there are also those who consider a normal 80 millimeters. Telephoto Lenses: They have long distances lengths over 100 mm, and are also called telephoto lenses. Long focal length seems to approach his subject, and to increase the size of the subject in a frame. Zoom Lenses: They are special in the sense that it can be versatile. Zoom lenses vary greatly in length and come in focal telephoto, wide angle, and also of great angle to telephoto. When you buy a zoom lens to check the rating for the f-stop. An example is f3.5-f5.6 lens of 24 millimeters to 300 millimeters which means the smallest f-stop for which you can shoot is in a range of 24 millimeters of the lens and if you zoom at 200 mm, then the less you could go is f5.6. When you buy a zoom lens, please try to get one that is made of glass and is the fastest you can afford, and you will not regret the decision. If what youunderstand different groups of lenses can do, this will help you make a more informed decision about what kind of lens buy. About the Author:

Alex is a writer about photography techniques for http://reshade.com . Reshade works in the field of online picture processing programs and offers a free online photo resizer web-tool. It’s also possible to purchase a photo resizer application for Windows. Give it a try !

Article Source: ArticlesBase.com – Why Lenses Are So Important When Buying A New Camera

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