808RC4 is the heavy duty unit you need for heavier loads. I have several heavy lenses that allow sagging due to the weight of the load. This head eliminates this problem and also keeps the head running smoothly. I have multiple heads including a ball and two pistols. They are good for light to moderate loads (3-6 pounds), but they have a hard time carrying heavy objects. I think many buyers overlook this when purchasing tripods and heads. The head itself is well made and seems to me to last a long time as a set. The system is a multi-track system that allows pan, tilt and vertical movement. I've used it with a camera, lens, and lights that weigh over 11 pounds. The head works smoothly in all directions and is perfectly fixed when needed. The Amazon price is great at $109.90. The closest competition I found was $170. I would recommend this item to anyone who wants quality at a good price.
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