The Manfrotto 577gives you the freedom to remove the camera from the head without detaching it from the plate and put it on any other support. Compatible with the 501PL (old 3433PL) camera plate (supplied with the 3433, 3460, and 3465 heads) and the special 501PLONG accessory plate.
0.8" (20mm) of sliding travel within plate to optimally balance gear
Female 3/8"-16, 1/4"-20, and 3/8mm threadings on bottom
Plate has 1/4"-20 and 3/8"-16 mounting screws, in addition to anti-twist video register pin