The first PRO FLUID VIDEO HEAD in the world with an interchangeable and adjustable counterbalance spring! WHY IS THIS IMPORTANT It's a fact that not all video cameras weigh the same; mini DV cameras may weigh only 2 lbs while professional grade DV cameras can weigh upwards of 22 lbs. This means professionals have as many equipment options as they do shooting styles, utilizing a wide range of different cameras including MINI DV, DVCAM, HD, ENG, and 16mm. Combinedwith numerous accessories, many of these setups can quickly overload video heads. Understanding the problem that professional videographers face, Manfrotto has developed the 519, a compact yet heavy duty fluid video head capable of counterbalancing payloads anywhere between 3.3 lbs to 20 lbs, and supporting up to 22 lbs. This is a revolutionary breakthrough from Manfrotto, as the 519 will be the only video head on the market encompassing both interchangeable and adjustable counterbalance springs. Combining both features will allow videographers to easily interchange a vast array of cameras of various weights, as well as quickly fine tune the perfect balance point of whatever camera being used -- all with just one head! In addition, fluid drag is easily controlled with a large continuous variable numbered knob in seven click-stop increments. Drag can be adjusted from the highest possible setting to nearly zero, allowing for the finest control through 360° pan, and +90° to -90° tilt. BEST OF BOTH WORLDS... 505 + 510 = 519 The 510 had an internal, non-replaceable counterbalance spring that could be adjusted. The 505 had interchangeable counterbalance springs that could not be adjusted. The 519 has both features in one.