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This error message pops up 95% of the time when shooting with my Tokina 12-24mm lens. The only way to actually take pictures without this error is to only take the lens halfway on, i.e the contacts arent touching eachother, i.e no error message. This results in blurry photos.
Obviously i've tried to clean the contacts with no luck and frankly I'm out of ideas.
Anyone had similar issues before? How did you resolve this?