Ok, well I did a studio test shot (umbrellas, 45 degree lighting but I just used the modeling lights on the strobe for illumination, so tungsten source) just to see what is actually going on with the in-camera settings for lens shading. Exp. is F2@1/30sec. ISO 100. Here is what I shot.
One shot taken with all lens compensation to off, the other shot taken with all lens comp. set to \"Auto\". First off, with raw in both cases, normal vignetting is not affected by in-camera setting. As far as color shift, it appears to do a tiny correction with the In-camera setting, at least going by the numbers and X-Y coordinates in Photoshop. The difference is not visible though to me - at least with this example. Here is what my numbers are for the raws:
Same X-Y coordinate comparing raw with and without in camera compensation:
Center: R-230, G-227, B-221 vs R-229, G-225, B-220
Corner: R-152, G-158, B-157 vs R-154, G-159, B-158
So, extremely subtle and not visible which is probably why I did not previously notice it. Perhaps it\'s more dramatic at further distances? or it varies with different lens samples? I don\'t know but I have not seen it yet with raws with landscape/ infinity type shots.
May 28, 2013 at 10:08 AM
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