Correcting Uneven Illumination & Magenta Cast with NEX-7 & Fisheye Lens
Here's my attempt at correcting the color cast and vignetting. I had a lot of trouble creating the reference image for Adobe flat field (posted in the thread). It worked reasonably well, but I found the color cast varied with aperture.
I also had a go at de-fishing the lens. Here's my Lightroom profile for that. I think it works pretty well, and the resulting rectilinear images even after cropping are extremely wide.
It's a very sharp lens, and perhaps it's worth the effort to correct out the issues on the NEX-7, but I prefer using it on 16M pixel bodies due to laziness. I really ought to test it out properly on the A7r (I did try it once in FF mode, hoping it would behave as a circular fisheye, but the built-in hood put a stop to that idea).
A rose by any other name is still a chicken.
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