The base ("native") ISO of a sensor

On Sat, 27 May 2017 23:52:46 -0700 (PDT), RichA
wrote:

On Saturday, 27 May 2017 04:44:29 UTC-4, Me wrote:
On 27/05/2017 5:19 PM, Alfred Molon wrote:
In article , Me says...
Oh nice.
Bill Claff has produced an interactive chart showing comparison between
set ISO and measured ISO.
Olympus OMD E1 MkII overstates real ISO by 1.23 stops!
Something many fanboys won't want to accept I guess - those ISO3200
shots are actually only ISO 1365 - LOL.
He's also measured base/native ISO is ISO 200.
http://photonstophotos.net/Charts/Measured_ISO.htm

He measures ISO 83 both at ISO 64 and ISO 200 with the Olympus E-M1 II.
But the exposure time at ISO 64 is three times longer than at ISO 200,
so clearly this Bill Claff is wrong.

DXO say the same, so no, Bill Claff is not wrong:
https://www.dxomark.com/Cameras/Comp..._1136_1070_909
Olympus lie about ISO. Big lies - Trump style lies.

DXO is for zombies. They think camera lenses "change their physical shaprness characteristics" with sensor size and resolution. News flash, DXO, they don't.
If they had an interferometer, they'd SEE that.

But they are not measuring with an interferometer. They are measuring
real performance with real sensors.
--

Regards,

Eric Stevens