How EXACTLY does the M8 vignetting correction work?

[mike prevette]

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In all the RAW software I have used the vignetting correction is done by raising the gain of the effected regions of the frame. This can result in unfortunate artifacts, and personally I would rather have slightly burned corners than noisy corners.

 

Example scenario: shot at 640 with the 15mm CV. Ok that leaves me almost 2 stops worth of vignetting in the corners. Correcting that would result in the outer corners having almost 2500 speed grain effecting it.

 

 

Q: Does the M8 correct for the vignetting by raising the gain, or by some form of sophisticated luminance mapping? (I have a hunch its the first one)

 

Q: Does anyone out there with the M8 and coded lenses notice a *textural* difference between the center of the frame and the corners of a corrected shot?

 

I'm hoping Sean specifically can answer to this as he has done such an amazing job exploring the depths of this camera.

 

 

_Mike_(burns his frame edges already)_Prevette