hendrik-sg said:I Think the TS/E 17 is very close to the border what is doable, visible at the extreamly bulbous front element. one of it's worst flaws is the extreme vignetting when shifted, which is difficult to correct, because the Software can not know how much it was shifted. So when shifting it to the extremes, it is better stopped down to f8 to reduce vignetting and incresase sharpness.
I've read recently about a solution for this problem, which I haven't tried myself. Is anyone familiar with it?
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