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faint red in bottom 1/4 of frame?
I have a 27F with very low miles and I saw something the other day when I was white balancing. In the bottom 1/4 of the frame I saw a faint red gradation going from side to side. When I pulled out I couldn’t see it. Then when I zoomed in to shoot some awards tight and I saw it again. I was shooing wide open at the time but when I stopped down to a 4+ it appeared to go away. Has anyone seen this problem before? Thom Zimmerman