Still the smallest SLR lens available that zooms to 400mm, the AT-X 840 AF D has a smooth and quick internal focusing system that means 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.
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 new multi-coating greatly reduces the chance of internal flare or ghost reflections.
A built-in tripod collar makes for a well-balanced camera/lens combination when using a tripod or monopod. For best results, Tokina always recommends using a tripod or monopod with telephoto lenses.
Tokina kept ease of use in mind with the new AT-X 840 AF D. A new 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. No more removing the hood to change the position of the filter.
Specifications:
- Zoom Range: 80-400mm
- Maximum Aperture F/4.5-5.6
- Minimum Aperture: F/32
- Optical Construction: 16 E /10G
- Minimum Focus Distance: 8.2 ft. (2.5m)
- Macro Ratio: 1:5.4
- Number of Diaphragm Blades 8
- Filter Size: 72mm
- Dimensions: 3.1 in. (79mm) X L 5.4 in. (136.5mm)
- Weight: 35.9 oz. (1,020g)
- Lens Hood BH-725
- Availability June, 2006
