I bought this a couple of years ago. A brilliant bit of kit and extremely well engineered. It's seen very little use and is in excellent condition. See web for reviews etc.

The Acratech 1160 Long Lens Head is designed as a telephoto lens support system capable of providing rock solid anchoring for even super telephoto lenses, such as a 600mm f/4 lens.

Although the Long Lens Head is designed primarily for long telephoto lenses with tripod collars, it can also be used with camera lenses that do not have a tripod collar. When the Long Lens Head is used with the camera body attached directly to the head, almost all standard camera positions are accessible (please see our video instruction manual for more information about this). This long lens support system is not necessarily a replacement for a general purpose ball head, but it does allow the photographer who primarily shoots with telephoto lenses to not have to carry a second tripod head into the field for occasional shots with standard lenses.

Will solidly support up to 600mm f/4.0 lenses

Eliminates the need to carry a large, heavy gimbal head

Provides easy, smooth balance for long lenses

Weighs less than 1 lb (.45kg) with quick release clamp

Large 18mm (.708") bullseye level

Fully adjustable tension control

Precision C.N.C. machined

Compatible with Kirk, Arca, and many other QR tripod plates

Beautiful satin black anodized finish

Fits all standard tripods (1/4-20 and 3/8-16 threads)

Engraved degree markings

Solid precision feel

All knobs are secured so they cannot vibrate loose and fall off