This is a lens called A001 by TAMRON. It is compatible with the Nikon F mount. I received it from a friend two years ago. Although it does not affect the photography or image quality, two screws are missing from the lens cap attachment. Also, since there is no original box, it will be shipped wrapped in cushioning material. Please be aware of this. As an example of the photos taken with this lens, my profile picture was taken with it.