f-stop

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f-stop

any of the settings for the f-number of a camera

f-stop

(Focal-STOP) The f-stop is the "aperture" opening of a camera lens, which allows light to come in. It also determines how much is in focus in front of and behind the subject (see depth of field). The f-stop is one of the two primary measurements of a camera lens. The other is the "focal length," which establishes how much of the scene is in view (see focal length).

Length Divided by Opening
The f-stop is the focal length of the lens divided by the diameter of its opening. Each consecutive f-stop halves the opening of the previous. For example, an 80mm lens with its f-stop set to f8 means that the optics inside the lens create a diameter equivalent to 10mm. Changing the f-stop to f16 creates a diameter of 5mm. See focal length.
References in periodicals archive ?
The actual range it can cope with depends on the exposure and f-stop setting of the camera.
95) covers every aspect of the digital photography process including cameras, f-stops, shutter speeds, ISO selection, exposure, batteries, white balance and more.
While 2007 sales remained flat, Daffron is just a few F-stops away from growing again.
She recalls: "All that stuff about shutter speeds, F-stops and meter light readings went right over my head.
The appendix reviews concepts for understanding light and the relationship between f-stops and filter choice.
And boy, has she been watching me, to the extent that sometimes her 'photographic' eye is so sharp, she knows immediately what she wants to shoot, how she sees light, way before she understood f-stops and camera technique.
The main ERI benefits provide two f-stops of exposure latitude, extended color space, high dynamic range with 36bit color image quality, and permits saving a minimum of four times more images in-camera than raw file formats.
At one point I had been drinking, and he was telling me about f-stops or some shit, and I just sort of nodded in agreement the whole time.
It also is true that most lenses reach a useable depth of field within two to three f-stops of their lowest numbers, which corresponds to an increase of four to eight times in the available light.
Shoot those great scenes at different f-stops, from different angles, and with lots of options.