HowTo? Determine whether highlights blown in ETTR RAW file? Need to "zero" all ACR settings?

Started Oct 13, 2012 | Questions thread
l_d_allan
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Re: HowTo? Determine whether highlights blown in ETTR RAW file? Need to "zero" all ACR settings?
In reply to Sailor Blue, Oct 17, 2012

Since the OP, I've become aware of the RawDigger utility, which seems to display actual 14-bit values from my Canon 5dm2 sensor.  I'm still a RawDigger newbie, and am unclear how to intrepret the values it shows.

I did a 1/3rd stop progression of images from a GMB-like Datacolor SyderCheckr + SypderCube  from under-exposed to over-exposed (increasing the exposure time). RawDigger seems to indicate that the pair of Green channels are being blown / over-exposed sooner than I would expect from LCD blinkies, but that may reflect ignorance on my part. I've posted a question to the RawDigger forum.

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