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Message: <blockquote data-quote="Marcel" data-source="post: 304113" data-attributes="member: 3903">From what you wrote, it seems the adapter you got is not the right size. The impossibility to focus beyond a certain point until infinity is because the mount is too long. And by too long, it doesn't have to be much but this is what it does. So the adapter does not work as it should.As for the aperture, I suspect that the aperture is not coupled to your camera and will stay closed to it minimum opening when you take the shots. Are you adjusting the aperture with the lens' ring? I would suspect not. Try using the aperture ring on the lens to see if that could solve your problem of exposure.</blockquote>