Another Olympus E-M1 and SONY a7 walkabout test, high ISO

Started Jan 29, 2014 | Discussions thread
blue_skies Forum Pro • Posts: 11,603
Re: Thanks for the truth!

Lab D wrote:

blue_skies wrote:

Henry showing the difference between sensors

It is very clear that (me) stating that a 4x sensor difference yields a roughly 2x stop difference is a VERY BIG DEAL. Well, the A7 has 1.5x stop and the A7r has 1.8x difference (if I calculated correctly).

Could you show us where on the DxO graph between ISO100 and ISO6400 where the differences are 1.5 and 1.8 stops? Just answer with the specific ISOs please.

I see about 1/2 at almost every ISO, but not anywhere near the 1.5 you keep dreaming of.

Again, compare the ISO scores at

See my other comments in my response to Anders here

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