This Helium Buoyfloat Arm Extension Ring - ULTRAMAX .25 lb Liftcan be used to add more buoyancy to the Helium Buoyfloat Arm Extension Ring - ULTRAMAX .25 lb LiftBuoyfloat system. Made of corrosion-resistant anodized aluminum, the 2" extension segment screws into the arm assembly to add another 1/4 pound of buoyancy to your underwater photography rig.

Use with ULTRAMAX Helium Buoyfloat    Adds 1/4 Pound of Buoyancy

Related Questions and Answers

Q: 1. is it two extension arms or one?

A: It's exactly as shown in the picture. One arm with one screw.

Q: 2. How many millimeters of extra distance does this push out the filter holder from the filter ring of the lens? I realize the height of this is 11.4mm, but the amount of extension will of course be less. Thanks!

A: The Cokin 72mm Extension Ring increase the distance beween th lens and the filter holder for 5mm. You can stack multiple rings until you get the distance needed for your composition.

Q: 3. Is this product capable of housing the Canon VIXIA HF R700 for water use? And if not, then what or which casing will? Thank You.

A: No, this is made specifically for the Ultramax. There is no specific underwater case for the Canon R700.

Q: 4. can you stack multiple extensions or is there a longer version, longer than 4inches?

A: That is certainly possible, however it would be a more secure solution to invest in a longer model. https://bhpho.to/35GluKa

Q: 5. Does it float or sink ?

A: The Buoyancy on the ULTRAMAX Helium Underwater Strobe Housing for Godox AD200 Flash is Slightly Negative. So, it will sink.

Q: 6. If using this with a regular light stand and a large modifier, is a sandbag needed?

A: Any time you have off axis weight you should take precautions to ensure stability.

Q: 7. would this fit the ursa mini?

A: I don't see why not. Both have arri rosettes, but you'll still need blackmagic's lanc cable.

Q: 8. Will this work with the Sony FS5?

A: You can attach Arri Rosette accessories such as this to the Sony PXW-FS5. You will need to order from Sony these extra parts: Rosette, Camcorder side: 4-546-932, Rosette, Grip side 4-547-089, 8x Mounting screws: 7-627-556. Sony parts: http://bit.ly/1HGHfF8

Q: 9. what are the dimensions (L x W x thickness) of a filled 25 lb bag?

A: It is approximately 20 x 7.8 x 5 inches.

Q: 10. Is it compatible with the Godox AD200 Pro?

A: No, the ULTRAMAX helium underwater strobe housing is designed and made for the AD200 unit.