[devilamb]

如題???

[pongyee]

Because "International Organization for Standardization" would have different acronyms in different languages ("IOS" in English, "OIN" in French for Organisation internationale de normalisation), its founders decided to give it also a short, all-purpose name. They chose "ISO", derived from the Greek isos, meaning "equal". Whatever the country, whatever the language, the short form of the organization's name is always ISO.

source : http://www.iso.org/iso/about/discover-iso_isos-name.htm

[wkkwok]

國際標準組織

[王迦南]

X我一下吧！

[pongyee]

樓主，

其實我地都係上網搵嗟。

[devilamb]

我想問相機影相調較的iso 是怎麼?

唔該！

[pigpig2000]

http://en.wikipedia.org/wiki/Film_speed

[233062306]

我想問相機影相調較的iso 是怎麼?

唔該！

樓上已經係...
我明你點解會認為 International Organization for Standardization唔關影想事...
不過...你都係睇哂上面d野先啦~

[王迦南]

X多我一下吧！

[devilamb]

唔該晒各位大佬！

[twheddie]

ISO應作ISO SPEED 還記得己往的菲林速度是ASA,ISO speed 取代了ASA speed,以下資料尋自wikipedia -

ISO film speed scales

International standard ISO 5800:1987 from the International Organization for Standardization (ISO) defines both an arithmetic scale and a logarithmic scale for measuring color-negative film speed. Related standards ISO 6:1993 and ISO 2240:2003 define scales for speeds of black-and-white negative film and color reversal film.

In the ISO arithmetic scale, which corresponds to the older ASA scale, doubling the speed of a film (that is, halving the amount of light that is necessary to expose the film) implies doubling the numeric value that designates the film speed. In the ISO logarithmic scale, which corresponds to the older DIN scale, doubling the speed of a film implies adding 3° to the numeric value that designates the film speed. For example, a film rated ISO 200/24° is twice as sensitive as a film rated ISO 100/21°.

Commonly, the logarithmic speed is omitted, and only the arithmetic speed is given (e.g., “ISO 100”). In such cases, the quoted “ISO” speed is essentially the same as the older “ASA” speed.

GOST (Russian: ГОСТ) is a pre-1987 arithmetic standard used in the former Eastern Bloc. It was almost, but not quite identical to the ASA standard. After 1987 the GOST scale was aligned to the ISO scale. GOST markings are only found on pre-1987 photographic equipment (film, cameras, lightmeters, etc.) of Eastern Bloc manufacture.

The most common ISO film speeds are 25/15°, 50/18°, 100/21°, 200/24°, 400/27°, 800/30°, 1600/33°, and 3200/36°. Consumer film speeds are generally between 100/21° and 800/30°, inclusive.

[iso_ray]

係咪叫我呀??

[Real Nobody]

係呀！仲叫你Ｘ多幾下喎！

[iso_ray]

唔怪得知我成日周身唔聚財啦......