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06/24/2009 09:04:18 PM · #1 |
I know what ISO is and what it does.
But do the letter I.S.O actually mean anything??
I tried to google it and came up with nothing!
Message edited by author 2009-06-24 21:20:45. |
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06/24/2009 09:06:15 PM · #2 |
| I believe its International Standards Organization. Here is a link. |
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06/24/2009 09:21:06 PM · #3 |
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06/24/2009 09:24:54 PM · #4 |
The second one i get, but the first one seems a bit funny, more about business standards than camera stuff .
It is starting to look just like a bunch of random letters stuck together. Unless it really is the first one, that to me, doesn't seem like it connects.
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06/24/2009 09:26:27 PM · #5 |
| If you go down to the "Products named after ISO" section it mentions film speed. The second is more on target for your question. |
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06/24/2009 09:49:09 PM · #6 |
Originally posted by JulietNN:
The second one i get, but the first one seems a bit funny, more about business standards than camera stuff . |
Canon is a "business." ;-)
Message edited by author 2009-06-24 21:49:23. |
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06/24/2009 10:10:03 PM · #7 |
Now a days it is one in the same, more or less.
If you really wanted to get picky, I think the terms "film speed" and "saturation-based speed" are what the numbers on the dial mean. ISO (International Organization for Standardization) established the format, so that "in theory" speed 100 on film (or digital camera) X is the same as film Y.
Since people like to shortcut things, it has just been adopted as ISO. People in the US use to call it ASA before and DIN in other countires. |
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06/24/2009 10:15:52 PM · #8 |
| Though still relatively "new" in the US, ISO is well known throughout Europe. Most businesses there (I am told) adopt ISO certification to stay competitive and be able to ship internationally. ISO standards/certification can cover virtually any type of business or product - film, food, fuel... or in my case pre-engineered metal buildings: I wrote the ISO certification and manuals for my employer several years ago. |
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06/24/2009 10:28:46 PM · #9 |
ASA referred to the American Standards Association - wikipedia link is //en.wikipedia.org/wiki/American_National_Standards_Institute, and many of the ASA (now ANSI) standards have been superseded by those of the International Standards Organization.
Originally posted by jaysonmc:
Now a days it is one in the same, more or less.
If you really wanted to get picky, I think the terms "film speed" and "saturation-based speed" are what the numbers on the dial mean. ISO (International Organization for Standardization) established the format, so that "in theory" speed 100 on film (or digital camera) X is the same as film Y.
Since people like to shortcut things, it has just been adopted as ISO. People in the US use to call it ASA before and DIN in other countires. |
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06/24/2009 10:31:04 PM · #10 |
Current ISO system
The current International Standard for measuring the speed of colour negative film is called ISO 5800:1987[1] from the International Organization for Standardization (ISO). Related standards ISO 6:1993[2] and ISO 2240:2003[3] define scales for speeds of black-and-white negative film and color reversal film. This system defines both an arithmetic and a logarithmic scale, combining the previously separate ASA and DIN systems.
In the ISO arithmetic scale, corresponding to the ASA system, a doubling of the sensitivity of a film requires a doubling of the numerical film speed value. In the ISO logarithmic scale, which corresponds to the DIN scale, adding 3° to the numerical value that designates the film speed constitutes a doubling of that value. 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; for example, âISO 100â
Pasted in from Wikipedia
In the olden days of film despite ISO/ASA official standards, Kodak was about a half stop faster than Agfa, and I forget where Fugi was but none of the various makers 100 ASA films were really the same. |
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06/24/2009 10:45:40 PM · #11 |
I thought it meant "Idiot Synchronization Organization" : P
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06/24/2009 11:23:45 PM · #12 |
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06/24/2009 11:40:17 PM · #13 |
After shooting film for many years using ASA numbers, the switch to iso was easy, and I am happy that they chose iso for digital instead of the DIN system. The math is easier when you are in a hurry to set up a shot for manual exposure.
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06/24/2009 11:45:01 PM · #14 |
Originally posted by MelonMusketeer:
After shooting film for many years using ASA numbers, the switch to iso was easy, and I am happy that they chose iso for digital instead of the DIN system. The math is easier when you are in a hurry to set up a shot for manual exposure. |
Amen, brother!
r. |
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