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Lens Mount Adapter FD-NEX IV Manual Focus Compatible with Canon FD & FL 35mm Lens and Sony E Mount Camera Body

SKU: KF06.502

Q
All lenses of my 80d fit on it, but always see a black blurry ring in the viewfinder. depending on the zoom more or less.
Answer Question
A
I have the Canon 24-70mm and 70-200mm on my M50 and no problems. There are problems with Sigma zoom lenses. There I have partially strong vignetting
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