Quote Originally Posted by Johnny Rasmussen


neuroanatomist,


Does your 40D really go all the way beyond -10EV ?


That´s strange. My 50D goes to -9EV and so does all the latest EOS models.



Sorry, but it's not my 40D. [:$] (I have a 7D, and had a T1i before that).


I pulled the image from this article comparing 12-bit and 14-bit images.


But, in DPP with images from my 7D, there is no gray space on the left side, i.e. it's white all the way over, past -10.0. In fact, I may be wrong and this may not even be an approximation of sensor dynamic range, but rather just a function of the version of DPP - from some other articles online (especially one by Doug Kerr), it seems that an older version of DPP went from -9.0 to +3.5. I also ran across a post indicating that an even older version of DPP (v1.6) had actual luminance values on the scale as well as the EV numbers - those numbers ranged from 0-4095 (which makes sense for a 12-bit image - 2^12 = 4096).