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iso = asa?
The title should read: ISO = ASA? ( dpreview did not let me use the capital letters in the title, saying I should not shout..).

How does ISO of digital cameras translate to the ASA of analog cameras?.

Or asking differently:.

If I us a digital camera for shooting a sample at e.g. f5.6 and 1/60 sec. at ISO 100, would that mean that I would get the same expossure on an analog at f5.6 and 1/60 sec. with an ASA 100 film?.

Thank you,AndreasPentax *istDS, Minolta A2, Fuji F31fd, Ricoh R3my fotos: http://flickr.com/photos/kuuan/my movies: http://www.youtube.com/profile?user=kuuan..

Comments (5)

Yep, found the answer, it looks like ISO = ASA:http://en.wikipedia.org/wiki/Film_speedPentax *istDS, Minolta A2, Fuji F31fd, Ricoh R3my fotos: http://flickr.com/photos/kuuan/my movies: http://www.youtube.com/profile?user=kuuan..

Comment #1

Kuuan wrote:.

How does ISO of digital cameras translate to the ASA of analog cameras?.

They are supposed to be the same..

Or asking differently:if I us a digital camera for shooting a sample at e.g. f5.6 and 1/60sec. at ISO 100, would that mean that I would get the same expossureon an analog at f5.6 and 1/60 sec. with an ASA 100 film?.

In theory, yes. However, some digital cameras use the REI method to determine ISO, and so they are a tad off. Canon DSLRs were known to be more sensitive than the rated ISO - see review of the 30D about the ISO/Sensitivity accuracy:.

Http://www.dpreview.com/reviews/CanonEOS30D/page20.asp.

Hope this helps...

Comment #2

Remember that a "digital camera" sensor is also an analog device...

Comment #3

Actually ISO (the international standard) is a combination of ASA (the American standard) and DIN (the German standard) for film (or sensor) sensitivity. For example, a box of Provia RDP III shows "ISO 100/21" meaning ASA 100 or DIN 21. Somewhere we got lazy and dropped the DIN. So for the way it's used, yes they're the same. It's a bit like having a new ISO standard for temperature replacing Celsius and Fahrenheit: "ISO 15/59" then having everyone just calling it ISO 15.Severinson.

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Comment #4

Same thing, new Universal designation..

I still find myself thinking "ASA" most of the time, hold habits are hard to die.Equipment in profile..

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I take a great picture, they ask me about my expensive cameras.I cook a great meal, no one asks me about my expensive pans...

Comment #5

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