The Tokina AT-X 840 AF D 80-400mm f/4.5-5.6 lens is amazingly compact for a zoom lens that has a bright f/5.6 aperture at 400mm. With a range from 80mm to 400mm, this is a whole range of lenses bundled into one shell.
Optically, the AT-X840 AF D has new multi-coatings applied to the elements that are formulated to compensate of the highly reflective CCD and CMOS sensors in today's Digital SLR cameras. The improved multi-coating greatly reduces the chance of internal flare or ghost reflections.
The AT-X 840 AF D has been improved and updated with a smooth and quick internal focusing system. This means that the all-metal inner barrel that houses the heaviest glass elements does not have to rotate when the lens focuses, making it much faster than the previous models.
Optimized for use with digital SLR cameras, with an equivalent range of approx. 128-640mm.
Built-in tripod collar makes for a well-balanced camera/lens combination when using a tripod or monopod.
The lens hood with the a PL Assist spring loaded thumb wheel allows a circular polarizer or special effects filter to be rotated while the lens hood is in place.