The following comes from their web site:
The bridge design improves the head's rigidity and its PAN friction control is fast, simple to fine-tune and protected from knocks. The PAN axis rotation unit uses ball bearings for smooth, vibration-free movement that can be adjusted using the head's FDS variable friction system.DSLR News Shooter has a video with Wayne Shulman of Manfrotto at NAB demoing the 504HD
The 504HD has a load capacity of up to 7.5kg (16.5lb.) The CBS counterbalance system has 4 presets for a full range of camera weights (0, 2.5kg-5.5lb, 5kg-11lb and 7.5kg-16.5lb). Two 3/8” threads on the top plate allow accessories (such as monitors and arms) to be directly attached to the head.
The 504HD is suitable for Manfrotto PRO series video tripods with mid-level or ground spreaders and for carbon fiber single-leg MPRO tripods.
DSLR News Shooter: Manfrotto launches tripod aimed at video DSLR at NAB 2010
Manfrotto: 504HD PRO VIDEO HEAD 75
[UPDATE 11:10PM] The 504 HD head, as well as combinations with different legs, are already listed on Amazon's site:
- Manfrotto 504HD Video Head (Black) $400
- Manfrotto 504HD,546BK Video Tripod Kit with 504HD Head and 546 Tripod (Black) $730
- Manfrotto 504HD,535K Video Tripod Kit with 504HD Head and 535 Carbon Fiber Tripod (Black)
- Manfrotto 504HD,536K Video Tripod Kit with 504HD Head and 536 Carbon Fiber Tripod (Black)
I see that B & H has it listed as well, (and with different tripods) and they say delivery in 7 - 14 days, but that doesn't match the quoted June date:
B & H: Manfrotto 504HD PRO VIDEO FLUID HEAD $400