Many ‘premium’ prime lenses have a maximum aperture of f/1.4, which lets through twice as much light as an f/2 lens and four times as much as an f/2.8 lens.

Many ‘premium’ prime lenses have a maximum aperture of f/1.4, which lets through twice as much light as an f/2 lens and four times as much as an f/2.8 lens.

A wide aperture, small f-number, means only a small portion of the image is in focus, in what is called a shallow depth of field. At f/1.8, for example, the subject’s eyes may be in focus, but ...

F-stop is a consistent way to measure lens aperture, and helps photographers control exposure and depth of field. It is noted with an f followed by a slash and number, for example f/2.8.

Lens aperture is an important criterion in any camera’s exposure adjustments. But, for low light photographers, it is equally important in determining the choice of which lens to use. Faster lenses (i ...

You can also achieve optically shallow DOF by getting the camera very close to the subject, as shown in the above photo. But a variable aperture lens would offer more control in more circumstances.

Canon's fourth 'hybrid' f/1.4 prime lens joins the 24mm, 35mm and 50mm Versatile 20mm wide-angle perspective and fast aperture List price is £1,919.99 / AU$2,999 (US pricing plus sales start date ...

F-stop is a consistent way to measure lens aperture, and helps photographers control exposure and depth of field. It is noted with an f followed by a slash and number, for example f/2.8.