| Arm Length | Amount of buoyancy per arm length |
| 8" (DB-BL08) | 4.5 oz |
| 10" (DB-BL10) | 8 oz |
| 12" (DB-BL12) | 11 oz |
| 14" (DB-BL14 | 14.8 oz |
| 16" (DB-BL16) | 1 pound 2 oz. |
With two arm lengths, 1 AC-CSB, 2 AC-CSF, and 1
strobe adapter and 1 base adapter these are the calculations:
You will need to add in the weight of your strobes underwater to these calculations
to get you to the buoyancy you need.
| Arm lengths | Amount of Buoyancy with parts listed above |
| Two 8" | neutral |
| 8" & 10" | 1.75 oz |
| Two 10" | 7 oz |
| 10" & 12" | 8.3 oz |
| Two 12" | 11.2 oz |
| 12" & 14" | 15 oz. |
| Two 14" | 1 pound 3 oz |
| 14" & 16" |
1 pound 6 oz |
| Two 16" | 1 pound 9 oz. |
The new style clamp (AC-CSB) is needed to put between the two new arms if
you want the arms to come together.
This clamp weighs 1.3 oz more than the regular clamp.
Salt water is approximately 1.026X more dense than fresh water.
All these tests were done in fresh water

Shows the size difference between the original buoyancy arms
and the new ones and the new clamp and the old clamp
|
Buoyancy
double ball arm segments
- were designed for users of heavy cameras and housings. They are
constructed of aluminum tubing with the ball ends press fit and glued
in. Air trapped inside allows them to be buoyant. See
weight & length page for comparisons.
|
![]() |
Clamps - These clamps are what holds the system together and gives it flexibility. Think of your own arms with the three joints and that is in essence what you have with your strobe arm.