Abstract: The invention relates to a telescopic boom for a vehicle crane, comprising a base housing (1), which may be mounted to an upper construction on the vehicle crane in a horizontal joint (2), at the lower end thereof and has further horizontal joint (3), to which a tipping cylinder, for inclination of the telescopic boom, which may be connected to the upper construction, may be connected and several telescopic stages (4-11), running either in each other or in the base housing (1), all of which may be telescoped by means of a telescoping device (12) directly connected thereto and which may be locked relative to each other in the telescoped position. One of the telescoping stages (4-11) is embodied from two part pieces (4a, b) may be locked together by stage (4), and both part pieces (4a, b) are pivoted together by means of a hinge.

Abstract: A nonslip resilient surface on the camera attachment area of a camera panhead, which utilizes readily available o-rings (1) arranged concentrically about the camera attachment screw (1B). The depths of successive ring grooves can be graduated to allow for more protrusion of the outer o-rings to assure positive seating with the camera base (2). The resilient o-rings can be retained in their grooves by their own elasticity.