A film's sensitivity to light, rated numerically so that it can be match to the camera's exposure control. Film speed ratings increase as the sensitivity of the film increases. Each time you double the film speed, half as much light is needed for correct exposure. Faster films need less light but they produce grainier pictures. Slower films have a finer grain and they produce more contrast. Pictures taken on slower films are sharper in appearance.
the relative sensitivity to light of a film. Several rating systems are used: ISO (most common in the U.S. & Great Britain), DIN (common in Europe), & others. Film speed ratings increase as the sensitivity of the film increases
Film Speed is a number set by the ASA and is the measure of a photographic film stock's sensitivity to light. A stock with relatively lower sensitivity requires a longer exposure and is thus called a slow film, while a stock with relatively higher sensitivity can shoot the same scene with a shorter exposure and is called a fast film. Reference: ASA
Measurement of a film's sensitivity to light. For example, ISO 100/21º indicates an ASA of 100, and a DIN of 21º. Together, both numbers equal the ISO.
The property of film that determines how much exposure must be allowed for a given light source to secure a negative of correct density and contrast.
The sensitivity of film to light. The higher the film speed number, the more sensitive the film. A higher speed film can be used in lower light situations than a low speed film. Consumer film speeds generally range between 50 and 800.
Digital cameras do not have film, of course, but many have settings that roughly correspond to an equivalent film speed setting. Having a digital camera with the capability of selecting different "speeds" is like having a camera with several different rolls of film from which the user can select. Settings of 50, 100, and 200 are often used. Digiscopers should experiment with their own combination of scope and camera to determine the best selection.
Measure of sensitivity of film to light. Usually expressed in an ISO figure.
The amount of time that it takes for the film to be exposed. Higher film speeds are more light sensitive, and can be used with faster shutter speeds.
Refers to the film ISO. Films with high ISO numbers are said to be "fast" those with low ISO numbers are said to be "slow."
is a measure of a film's sensitivity to light. Faster films tend to have more grain and less resolving power.
In general, film speed refers to the amount of sensitivity to light that a given film has. Different types of film have different "speeds", that is different sensitivities, to light. Speeds are indicated by " ISO" numbers. Low ISO numbers (i.e. 25) would indicated a "slow" film, not comparatively sensitive to light. High ISO numbers (i.e. 800) indicate a "fast" film, very sensitive to light.
Film speed (measured as ISO) indicates how sensitive to light the film is. The higher the number the faster the film.
An arbitrary number placed on film that tells how much light is needed to expose the film to the correct density. Generally, the lower the ISO number, the finer grained and slower a film. ISO means International Standards Organization. This term replaces the old ASA speed indicator. The slower the film, the more light is needed to expose it. Black and White ISO 25-100-Very fine grained and low contrast. ISO 100-400-Fine to Medium grain and higher contrast. ISO 400-3200-Heavy grain and considerable contrast. Color Negative Films The same rule applies to negative color films as black and white films. The lower the ISO number, the finer the grain. Transparency Films These are color reversal films. Again, in general, the lower the ISO the finer the grain, and the lower the contrast. Recently, new film emulsions in the ISO 50 to ISO 100 range have been released. They are very fine grained, but are also extremely color saturated. This means the colors are bright and vivid, but not necessarily accurate.
This indicates how sensitive the film is to light and is represented by a number such as ISO 100 or ISO 400 etc. Note that the higher the number the more sensitive or faster the film.
A number which denotes how sensitive the film is to light. The higher the number the more sensitive, or fast, the film is said to be. Fast film contains more and bigger crystals of silver halide which increases sensitivity. See ASA / ISO.
A measurement of photographic film's light sensitivity. The higher the number (ranging from 60 to 400 in most cases), the more light sensitive the film.
Sensitivity of film to light (fast film is more sensitive)
Sensitivity to light (fast film is more sensitive but results in more grain)
the sensitivity of a film to light, indicated by a number such as ISO 100. The higher the number, the more sensitive or faster the film. (ISO stands for International Organization for Standardization)
Film stock has a variety of speeds which is created by the size of the silver halides in the emulsion. The smaller the grain, the slower the film which in turn requires more light to achieve the correct exposure.
The relative light sensitivity of the photographic emulsion (film). Expressed in ISO (International Standards Organisation) (ASA on older cameras), the film speed, or sensitivity to light, increases with the number. For example, an ISO 100 film requires less light than an ISO 50 film. Each time you double the film speed, half as much light is needed for a correct exposure. Faster films need less light but they produce grainier pictures. Slower films have a finer grain and they produce more contrast. Pictures taken on slower films are sharper in appearance. The most popular film speeds are: ISO 25, 50, 64, 100, 125, 200, 400, 800, 1600.
A numerical measurement that gauges the amount of light needed to expose the film. Normally, the lower the number for film speed, the greater the amount of light required to expose the film. Film speed is related to Film Grain.
Refers to a film's sensitivity to light. Lower-speed films are less sensitive (use these on a bright, sunny day). Higher-speed films are more sensitive (use these in low-light situations).
The sensitivity of a given film to light, indicated by a number such as ISO 200. The higher the number the more sensitive the film is to light. Therefore, film with an ISO rating of 200 would need more light then film with an ISO rating of 800. The amount of light can be controlled by aperture or shutter speed. See also: Aperture | Shutter Speed
A measure of the sensitivity of photographic film to light. Larger numbers indicate higher sensitivity.
The higher the ISO umber the faster the film. The faster the film the quicker it can record the image, which means the larger depth of field or being able to freeze movement.
The film's sensitivity to light. For example, an ISO 100 film requires twice as much light as an ISO 200 film.
Indicated by a number such as ISO 100 or ISO 400 etc. The sensitivity of a given film to light,. The higher the number, the more sensitive or faster (and more grainer) the film. Note: ISO stands for International Standards Organization.
ISO stands for International Standards Organization and numbers such as ISO 100 or ISO 400 etc. give the sensitivity of film to light. The higher the number, the more sensitive or faster the film. Basically, the slower the film (low ISO No.) the sharper and clearer the photograph. Grainy effects can be achieved with fast films (high ISO No.).
The relative sensitivity to light of photographic film. Measured by ISO (or ASA or DIN) rating. Faster film (higher number) is more sensitive to light and requires less exposure than slower film. See also Speed.
A measurement of film's sensitivity to light, generally in numerical terms of an ISO exposure index - e.g. ISO 100. More sensitive (faster) films have higher ISO numbers and require less exposure in order to make a properly-exposed picture. The FILTER selection available to photographers is tremendously wide.
A measure of the film's sensitivity to light expressed in numerical terms, providing an "exposure index."
a film's sensitivity to light, usually represented in ISO numbers. Common numbers include 50,64,100,200,400,800, and 1600. The higher the number, the "faster" the film, and the less light it requires for proper exposure.
The measure of a film's sensitivity to light, film speed is indicated with an ISO number--ISO 400, for example. The higher the number, the more sensitive the film.
The measure of a film's sensitivity to light, the film speed is indicated with an ISO number, such as ISO 200. The higher the number, the more sensitive the film.
Film speed is the measure of a photographic film's sensitivity to light. Stock with lower sensitivity (lower ISO speed rating) requires a longer exposure and is thus called a slow film, while stock with higher sensitivity (higher ISO speed rating) can shoot the same scene with a shorter exposure and is called a fast film.