Samyang 8mm lens - adjust or return?

Started Mar 2, 2012 | Discussions thread
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adhock
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Samyang 8mm lens - adjust or return?
Mar 2, 2012

I've recently purchased a Samyang 8mm AE Fisheye lens (w/ CPU) for my D7000, but I can't figure out whether I've received a dud one. When the focus ring is turned to infinity, the pictures are a blurry mess. Everything (even on areas in the distance) seem to be sharpest when the ring is set to the extreme other end (0.3m).

I know there are a lot of articles online that mention adjusting the focus on the lens by peeling back the ring and tightening the screws - based on the examples below, is it worth doing this or returning to try and exchange for a new one?

Any advice would be great - I've got minimal experience with manual focus lenses.

ISO200, F11, Focus: Infinity

Crop

ISO200, F11, Focus: 0.3m

Crop

Nikon D7000
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