Used with single lens reflex (SLR) cameras, a telephoto converter (more generally known as a teleconverter) is attached to another lens to increase its focal length. Teleconverters are commonly available in powers of 1.4x, 1.7x, and 2x.
Function
Telephoto converters can be used with either a fixed focal length lens (as in 85 mm) or a zoom lens (as in 28 to105 mm). When attaching a 1.4x teleconverter to an 85 mm lens, you multiply 85 mm by a factor of 1.4, giving you a new focal length of 119 mm. "Would you like to discover digital photography solutions that deliver experienced photographers to where they are today? Well, The Top Secret Photography Techniques would help you out in doing so. To find impressive pictures we initially need to have to look at some imperative photography techniques. The primary one I am able to share with you is determine about light. You can discover all the things concerning photography techniques on , The Top Secret Photography Techniques. Whenever you learn about light and in what approach it interacts with the direct environment then your images will get improved..". Similarly, a 28 to105 mm lens with a 1.4x teleconverter becomes 39 to147 mm.
Significance
A teleconverter extends the focal length of your lens without your having to purchase a separate longer lens. Teleconverters are significantly less expensive than a new lens. Teleconverters can also be attached to many different lenses.
Consideration
By attaching a teleconverter, you will compromise the sharpness of your original lens. If possible, purchase only a high-quality teleconverter.
Another Consideration
The power of a teleconverter will also change the speed of your lens. The fastest speed of a lens is determined by its biggest f-stop (or lens opening). If you are using a 1.4x teleconverter with an f2.8 lens, that f2.8 becomes an f4.
Benefit
Teleconverters are especially popular in wildlife photography. For example, using a 500 mm lens augmented by a 1.7x teleconverter can help you capture an exceptional photo of that distant and exotic bird.
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Telephoto lens - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Telephoto_lensIn photography and cinematography, a telephoto lens is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length.
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