Focal length is the optical distance in millimeters between a camera lens and the sensor or film. It determines the height and width of the scene being captured, known as the "field of view." A ...

Camera lenses explained: Prime and zoom lenses Prime lenses are lenses that have a fixed focal length, whereas zoom lenses allow you to change between focal lengths without changing lens.

At this point it's worth clarifying exactly what is a variable/continuous zoom module. Plenty of camera phones have what's ...

Manufacturers measure the focal length focused to infinity to keep a standard. Focal length is measured in millimeters. A 50mm lens will have a point of convergence of 50mm (or 5cm) from the sensor.

Discover how these focal lengths can transform your portrait photography – and how each one shapes the way your subject is ...

Focal length is the optical distance from the front element of a lens to the point where light rays entering the lens converge to form a sharp image on the sensor, and is expressed in millimetres.

Replay: Do we really need to keep using 35mm as our baseline for focal lengths, or is there a much better way? Why do we keep reading descriptions like ‘3.7 mm to 92.5 mm (equivalent to 28.8 mm to 720 ...

Meller Sapphire Optics are custom fabricated and feature a curve radius tolerance of 0.5" to 2.5" with focal length accuracy of ±0.0005", depending upon radius, to provide optimum clarity ...

Sports photogs aren't compensating for something by swinging gigantic, monopod-mounted lenses; they need the focal length. Focusing and zooming on outfielders usually means glass far from the ...

Picking what lens you will be mounting on your camera is one of the most important creative decisions you can make as a photographer. The focal length you choose will significantly affect how the ...