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Lensbaby

rating is 1

Anonymous, 21 November 2008 13:56

Lensbaby is the name of a manufacturer who has developed a new type of lens with a revolutionary system. The Lensbaby flexible lens mounting system allows you be more experimental, bending and shaping the lens as you wish to create a point of sharp focus surrounded by a graduated blur. For more information on a range of Lensbaby products click ...

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Lensbaby

rating is 1

Anonymous, 21 November 2008 13:56

Lensbaby is the name of a manufacturer who has developed a new type of lens with a revolutionary system. The Lensbaby flexible lens mounting system allows you be more experimental, bending and shaping the lens as you wish to create a point of sharp focus surrounded by a graduated blur. For more information on a range of Lensbaby products click ...

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Hunting

rating is 2

Anonymous, 29 October 2008 15:42

Hunting occurs when a camera cannot auto focus, and the lens  ‘hunts’ back and forth for the focus. While hunting the camera will focus to infinity then at the closest focus, it will repeat this process usually about two times until the AF locks on.

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Extension tubes

rating is 0

Anonymous, 07 October 2008 16:47

Extension tubes are hollow tubes that fit between the camera and the lens. They increase the distance between the lens and the camera, decreasing the focusing distance of the lens. They are used for macro photography, giving the photographer the opportunity to focus much closer to objects.

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Maximum Aperture

rating is 3

Anonymous, 23 September 2008 17:16

A lens’s maximum aperture is the setting when the lens blades are open at their widest point, which in turn allows the maximum amount of light to pass down the lens. The maximum aperture of many lenses varies as you change focal lengths; with a focal length of 70mm the maximum aperture could be f/4.5, but when you zoom to ...

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Chromatic aberration

rating is 0

Anonymous, 23 September 2008 12:51

Chromatic aberration is the name given to the ‘fringes’ of colour around the edges of objects in an image. It occurs because each colour in the light spectrum is on a different wavelength, and the extremes of cheaper lenses can’t always focus these different wavelengths at the same point, and so creates a colour fringe around objects.

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Lens Hood

rating is 4

Anonymous, 15 September 2008 17:35

A lens hood is usually made from strong plastic material and is fitted onto the front of a lens, shielding it from sun flare. The geometry of a lens hood can vary between different lenses and the more complex tulip hoods are generally used on telephoto lenses to prevent the hood from blocking the field of view. Wide-angle lens hoods ...

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Fast Lens

rating is 3.5

Anonymous, 03 April 2008 09:40

Lenses that allow photographers to work with fast shutter speeds are often referred to as fast lenses. The more light that reaches the camera’s sensor, the faster a shutter speed can be used to achieve the correct exposure. A lens setting of f/2.8 allows the maximum levels of light in as the lenses aperture is open at its widest during ...

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Telephoto lens

rating is 1.5

Anonymous, 23 October 2007 15:05

The term telephoto has become a general description of any lens with a focal length above 50mm. These lenses give a narrow field-of-view, allowing you to fill the frame with objects that are further away from you than when using a shorter focal length lens. Technically, the term telephoto refers to a particular design of lens where the physical length ...

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Stop

rating is 3.5

Anonymous, 23 October 2007 15:02

A stop is an expression used to specify an amount of exposure without necessarily stating the shutter speed or aperture. Each stop either halves the amount of exposure given (-1 stop) or doubles it (+1 stop). You’ll find it most commonly referred to when using the exposure compensation function, where you can alter the exposure suggested by the camera by ...

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Professional lenses

rating is 3

Anonymous, 23 October 2007 14:40

Many professional lenses offer extra features that make it possible to take pictures in the most demanding conditions. Extra wide maximum apertures and image stabilisers mean that you can shoot in lower light conditions. Then there’s image quality. More expensive doesn’t guarantee better quality, but higher quality glass and more precise manufacturing means that they generally give superb results. Look ...

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