This black Ultralight Long Ball Clamp with T-Knob - Kelp Greenfrom Ultralight Long Ball Clamp with T-Knob - Kelp Greenis used to connect light arms to underwater camera rigs, or arm sections to each other, using 1" mounting balls. This clamp measures 3" between the centers of the ball recesses. The kelp green anodized T-Knob makes tightening and loosening the clamp easy, and it can be useful to the cinema industry for color-coding camera rigs.

Anodized T-Knob    Useful for Color-Coding Camera Rigs    3" Center to Center

Related Questions and Answers

Q: 1. I am really confused as to what is needed to use this ballhead. I just bought the tripod, about to purchase a ballhead_but it doesnt come with a camera mounting plate? I look for wat I think is a mounting plate to use with my R5 and I'm not sure what I am looking at and what I am looking for. Can't find anything on the website that resembles other sites for comparison. Help

A: RRS heads do not come with plates, and they primarily recommend dedicated plates that fit your camera exactly that work with the BH55, such as these ones: https://bhpho.to/2T8XHjW https://bhpho.to/3rNsilf

Q: 2. Will the FB-52 handle a Nikon D300s with battery pack and 400 F3.5 Nikkor lens?

A: Yes, it handles up to 44lbs, more than enough to handle this kit well.

Q: 3. Does this compatible with Gitzo GT3543XLS Systematic Series 3 Carbon Fiber Tripod ?

A: Yes. The tripod uses a 3/8-16 threaded stud. The RRS BH-55 uses a 3/8-16 threaded insert. They work great together.

Q: 4. Does this come with an arca type QR plate?

A: No, i'm sorry this head does not come with a plate. Please click the link below to view some possibilities; https://bhpho.to/2MPa6UH

Q: 5. Does this truly pan 360 degrees or is panning achieved only by movement of the ball?

A: The BH-25 will pan by the movement of the ball head. The BH-30 will have a seperate panning lever. See: https://bhpho.to/2yDP42r.

Q: 6. Will this Ball Head mount to a Manfrotto Tripod?

A: This ball head will mount to any standard 3/8" mounting screw, which is nearly all Manfrotto tripods with a removable head.

Q: 7. Will this be okay to use with an a7Riii and a Fe 24-70mm f4? Seem to be under the 8lbs weight requirement, just not sure how it is in real-world use for traveling.

A: Yes it will be. This head has an 8.8 pound load capacity, the combination of A7RIII and FE 24-70 F/4 lens are well under that load capacity.

Q: 8. Will this ballhead hold nikon d800 plus 80-400 mm lens?

A: The combined weight of the Nikon D800 DSLR camera and the Nikon is 5.43 lbs. As such, the would work to support your camera/lens setup. While it is personal preference, as a safety precaution, I typically like recommending tripod heads with a maximum load capacity that is 3x higher than the combined camera/lens setup weight. As such, my personal recommendation would usually be for the Really Right Stuff BH-40 Ball Head with B2-mAS Mini Clamp, B&H # REBH40PRO, or if you needed a head with a smaller base diameter, the Really Right Stuff BH-30 Ball Head with Mini Screw-Knob Clamp, B&H # REBH30PRO, is a good option, but yes, the Really Right Stuff BH-25 Ball Head would work for your usage needs.

Q: 9. will this ballhead hold a niko d800 and 80-400 lens?

A: That lens and camera weigh nearly 6 lbs, which is too close to the load capacity of 8.8 lbs. You can never have too much capacity. This RRS ballhead would be a much better option: https://www.bhphotovideo.com/c/product/1301053-REG/really_right_stuff_bh_30_pro_bh_30_ballhead_with_mini.html

Q: 10. How is this screw know compared to the lever clamp?

A: The screw and the lever are personal preferences, beyond that some users like the lever when they are shooting in cold weather and wearing gloves. The lever is much easier to use with gloves and is also quicker.