Ok so I took some test pics, but not sure if I use it right.. judge and comment
@Danne, do you experience any trouble with the Auto ETTR when shooting non live view?
For me it's rather random, sometimes (only sometimes) it works fine, but most of the time it just lights up the LV and state Auto ETTR and then shut down right away without doing any changes... but when shooting in LV it works fine most of the time (sometimes I get rather random results though). I've been trying to search and read up on how to best use the Auto ETTR but haven't found much..
Anyhows here are my test pics all shoot at f/8 straight out from camera (obviously the DUALs have been converted) only added tiny sharpening in LR5. DUAL ISO set to 100/800
First ISO 100 1/100sek
Then a DUAL one exposed for ISO 100 1/83sek
DUAL with Auto ETTR gave me ISO 100 1/41sek (seem to get some blown out highlights but maybe that should be fixed in post?)
Then I tried to make the ISO 100 and the DUAL Auto ETTR to look as similar as possible by changing exposure, pulling down highlights and boosting shadows, tweaked blacks and whites a bit too, everything else untouched. Oh sorry I had to change the white balance too as the colors were way different the DUAL one was a lot warmer (as you can see comparing the first 2 pics), sampled it from the same spot on both.
First out is the ISO 100
Then DUAL Auto ETTR ISO 100/800
Don't know really but almost seems like ISO 100 is coming out on top for the shadows? The DUAL ISO one is more vibrant though, a bit like boosted saturation! BUT maybe I'm using it all wrong? And I did shoot hand held so I know the frame isn't exactly the same (which I find a bit annoying, should have brought my 3pod)
So let me know what you think, tell me if I'm using it completely wrong etc, just shout anything at them
CR2s are available if anyone should be interested.
On a side note, imagine if we could have the duals processed in camera