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Prime lens

A lens with a fixed focal length, as opposed to a zoom lens. Prime lenses are more restrictive, but they tend to produce better optical quality with fewer aberrations and offer a wider maximum aperture. They also tend to be lighter and smaller, and many photographers find that having to change position to get the best framing leads to better pictures.

Lens aberrations and what you can do about them

September 14, 2019 by Rod Lawton

No lens is optically perfect. In the ideal world, every lens would produce a sharp, undistorted, evenly illuminated image that’s sharp from edge to edge. Some lenses come close, but the fact is that lens designers have to work within the limitations of the laws of physics and the glass materials they have available, and […]

Lens types and what they’re used for

August 24, 2019 by Rod Lawton

The advantage of interchangeable lens cameras like DSLRs and mirrorless cameras is that you can change lenses for different kinds of photography. There are many different types of lenses, often with specific names. Lenses are usually characterised or grouped by their focal length. It might be more useful to use their angle of view instead, […]

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