Flat Field Panel

 
LED Light Panel on foamboard Foamboard backing with sides & bottom fixed
So with a little adjustment to EV, I got the histogram exactly where it should be, central as seen in the 1st image.

In image 2 the generated Flat Field image, corner vignetting can be clearly seen along with a number of 'dust bunnies'.
I am very pleased with the outcome of this simple & relatively cheap build.
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