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[OM] ISO "invariance" in Sunny sensors--RIP ETTR?

Subject: [OM] ISO "invariance" in Sunny sensors--RIP ETTR?
From: Mike Gordon via olympus <olympus@xxxxxxxxxxxxxxxxx>
Date: Tue, 7 Apr 2015 19:15:52 -0400
DPR really missed the boat on shutter shock until their nose was rubbed in it 
but they picked up on the very different behavior
of the Sunny sensors with an interesting analysis.  Have seen various examples 
over the past few years but this is the first I've seen mentioned of a very low 
threshold effect:

http://www.dpreview.com/reviews/sony-alpha-7-ii/11

Seems little penalty to just pull up shadows  in post above ISO 800 with A7II 
and even at ISO 200 in Nykon D750.  So just don't clip at all and little or 
nothing is lost as far as noise is concerned. Wonder where that threshold lies
with E-M5(11)?

We did discuss this in part before.  Would not try this with Canyon (low "N1" 
noise) where much better to dial up ISO and ETTR.

http://lists.tako.de/Olympus-OM/2014-01/msg02142.html

Please keep the noise down, Mike




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