The Photek TRI-X-2500 Tripod Extender can be mounted on the Vanguard Alta Pro 264AB 4-Section Aluminum Tripod, and the SBH-100 Ball Head could be mounted on the end, yes. Though, depending on the weight of your camera/lens, you might want to hang a bag or some weights from the hook at the bottom of the center column to help give some added stability.

Yes, the Photek TRI-X-2500 will fit on a Slik 300DX tripod. This product will work on any tripod with a 1/4 -20 or 3/8 -16 mounting stud.

Yes it will attach to a Ravelli tripod and can either be attached to the legs or the head.

The travel tripod says it has a 1/4"-20 Male mounting screw in quick-release plate. The Tripod extender has a dual 3/8"-16 and 1/4"-20 thread. The tripod should work fine.

While you could technically mount the TRI-X-2500 on the Sunpak 7575 tripod, the those legs arent the most stable. Your camera and lens are fairly light, but the system might not be stable enough to keep from tipping over. At the very least, you would want to hang something on the other side of the bar to help balance out the system.

Yes that will work on your tripod.The bottom plate of the Photek TRIX-2500 has both the 1/4 and 3/8 mounting thread. The max support weight is 6 1/2 lbs.

Yes, this arm would work on your tripod (or any that features a 3/8 or 1/4-20 connection). You might also want to use a shot bag to counterweight the arm:Impact Shot Bag, Black - 5 lbB&H # IMSHB5 Mfr # SHB-5

Unfortunately, I cannot provide assistance with this inquiry via this forum. For the above inquiry, it would be best to contact our Professional Photography Department via e-mail at [email protected] with your inquiry, along with images of both the screw and the bottom base of the extender, as well as the quick release plate. The best guesstimate I have is, as the tripod extender is designed for use with both 3/8 -16 and 1/4 -20 tripod screws, you may be referring to the adapter bushing to convert a 1/4 -20 thread to the larger 3/8 -16 thread, but there is no way to confirm via this forum. As such, I recommend contacting the Pro Photo Department as stated above via e-mail.