Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Autofocus does not work with Nikon D3100

Although the seller, PCNation, does not mention it in the item description, the auto focus function does not work with the Nikon D3100. Additionally, the D3100 only allows photos to be taken at f-stop setting F/22. If you are expecting to use this lens with the D3100 as an autofocus lens or as a manual lens using all f-stops, you will be disappointed. When I contacted PCNation to return the lens, they advised me there would be a 15% return processing fee, although they failed to explain that the lens does not work with the Nikon D3100. Had they done so, I would not have purchased the lens. So with paying for shipping and the 15% processing fee, I'm better off just keeping the lens as a paperweight. I will never make another purchase from PCNation.