See the article at: https://en.wikipedia.org/wiki/Exposure_value
The new series was introduced by Deckel for the EVS system about 1960.
Also see: http://www.kenrockwell.com/tech/ev.htm
I am not sure but think the system may have been introduced on a
Rolleiflex camera.
On 10/21/2015 1:32 PM, Eddy Willems wrote:
can someone tell when the old serie shutterspeeds 1 2 5 10 25 ...
changed in the new serie 1 2 4 8 15 ....
best regards
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