film speed

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film speed

the relative sensitivity of film emulsion to light or radiation exposure; speed is inversely related to detail resolution.
Farlex Partner Medical Dictionary © Farlex 2012

film speed

The sensitivity of a photographic medium (e.g., a radiograph) to light or radiation. The film speed is determined by: the size of its silver halide crystals; the thickness of the emulsion; and the presence of radiosensitive dyes. Films are described as “fast” if the film requires little radiation to produce an image and “slow” if more radiation is needed.
Medical Dictionary, © 2009 Farlex and Partners

film speed

(film spēd)
Relative sensitivity of film emulsion to light or radiation exposure; is inversely related to detail resolution.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Set Compression Accuracy Accuracy of our ratio of Li [9] method 1 100% 0% 80% 2 80% 0% 84% 3 60% 56% 80% 4 40% 84% 88% 5 20% 92% 92% 6 5% 100% 100% TABLE 4: Combination of ISO speed and respective TP rate.
Changes in the ISO speed when shooting in digital portrait photography affect less the properties of the taken portrait photographs, then when a classic photographic system is used.
Evaluation of the ISO speed (Table 2) shows that observers generally marked portraits shot with the ISO speed 400/27 ISO and 3200/36 ISO as photographs shot with lower ISO speed what is specially expressed at the portraits shot with 3200/36 ISO (neither one photographer-expert has evaluated that portraits were shot with ISO speed from 1600/33 ISO or more).
When combined with the upgraded DIGIC 4+ imaging processor in tandem with a CCD sensor, processing time is improved by up to 60 percent when shooting at high ISO speeds. The camera also features improved intelligent IS function, enhanced start-up and auto-focusing time, making this brilliant camera easy to use.
Fast, airtight and efficient the Iso Speed Cold door has heating traces between the panels and in the side guides.
Shoot at shorter focal lengths, higher ISO speeds, or faster focal ratios, all to reduce exposure times and image scale.
For every doubling of the ISO speed, a film requires half the exposure time.
Gas hypersensitization of color films effectively doubles their ISO speed without increasing film grain.