Tokina's updated 11-16mm f/2.8 for APS-C — CF coating and improved internals over the original.
The Tokina atx-i 11-16mm f/2.8 CF is a carbon-fibre variant of the atx-i 11-16mm f/2.8, an APS-C ultra-wide zoom with constant f/2.8 aperture. The CF designation indicates carbon-fibre barrel construction for reduced weight versus the standard aluminium atx-i 11-16mm. Nikon F mount for Nikon DX APS-C DSLRs.
f/2.8 constant aperture. 11-16mm zoom range (approximately 16.5-24mm equivalent on APS-C). Carbon-fibre housing. 11 elements in 10 groups. 77mm filter thread. At approximately 400g. Minimum focus approximately 0.28m. Nikon F mount.
The atx-i 11-16mm lineage traces to the well-regarded Tokina AT-X 116 Pro DX; the atx-i update refreshed coatings and external design while retaining the optical formula. The CF variant reduces weight modestly over the standard atx-i without changing the optics or mechanics. Constant f/2.8 is an advantage for interior, landscape, and astrophotography work on APS-C format.
On the used market the Tokina atx-i 11-16mm f/2.8 CF Nikon F is an affordable constant-aperture ultra-wide zoom for Nikon DX cameras. Condition checks: CF barrel for cracks, 77mm front element for marks, f/2.8 aperture smoothness, focus ring and zoom ring action. Compatible with Nikon Z bodies via FTZ adapter.