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Old October 29th 15, 05:53 PM posted to rec.photo.digital
Floyd L. Davidson
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Posts: 5,138
Default How to measure ISO

nospam wrote:
In article , Floyd L. Davidson
wrote:

No cameras "cheat". The Standard basically says that any method
the manufacturer likes, is okay. That makes cheating not only
unnecessary, but virtually impossible.


then there is no standard.

And in fact it's a system that has turned out to work well
enough over the years!


clearly not.

if iso 100 on one camera is not the same as iso 100 on another camera
or the same as with film, then the number is meaningless.


Okay, it works well for everyone except you.

--
Floyd L. Davidson http://www.apaflo.com/
Ukpeagvik (Barrow, Alaska)