Yea it is, and as quatro said works fine on a FX so long as you don’t bring it under 14 or so. Hell you can use 11 too, just going to need to crop out the barell
I was freaking out between buying this and just buying all FX compatible lenses in case I ever upgrade, but I don’t see me ever going to an FX camera, and besides aside from this lens and 1 other most of the quality lenses I want are FX anyways.
Only thing I’d be worried about is if in the near future APS-C get phased out and everything goes FX