Vivitar Tripod Ball Head Brand_Air Innovations the effective AF range is

the effective AF range is limited to an area roughly 88% x 100% of the total image frame

Chipset Model: Promontory B550A

and with the final overcoat layer

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The dual shock mount eliminates any kind of mechanical noise for trouble-free live use

Vivitar Tripod Ball Head Brand_Air Innovations the effective AF range isThe Vivitar Tripod Ball Head will support camera lens combinations weighing up to 11 lb. Crafted from aluminum alloy, the Tripod Ball Head has all the features you'd expect from a professional level head. Product Details 360 degree swivel with 90 degree portrait angle tilt Durable anodized aluminum construction Two locking knobs and friction control system for fine adjustments Vertical and horizontal bubble levels are ideal for accurate alignment