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Ultralight Strobe Arm Products for Underwater Photography
Shrimp on Sea Cucumber

Ultralight Strobe Arms, Trays and Accessories for Underwater Photography
UltraLight Control Systems makes a very light weight arm system, possibly the lightest on the market. All arms and adapters have an O-ring in the ball. This greatly increases the friction forces at the clamps, so when underwater the clamp tension can be adjusted to allow easy adjustment of the arms for strobe positioning while at the same time holding the strobes in place. Tightening them even further keeps the arms and strobes in place when carrying the assembled camera rig to and from the water.

For two strobe photography, a second Complete Arm Set will be required.

Nexus America also stocks Ultra Light accessories for Nikonos - fixed single and double Nikonos trays and Nikonos pivot trays.

For the Nexus housings we recommend the following Complete UltraLight Arm Set: Nexus Housing with Ultralight Control System Arms
1. Dovetail Base #BA-AQ- Comes with stainless steel screws for easy mounting to the Nexus handles.
View the Baseplate Choices.
2. Two Double Ball Arm Segments in your choice of the following lengths:
  • 5"- #DB-05
  • 8"- #DB-08
  • 12"- #DB-12, or
  • 16"- #DB-16
8 inch segments are the most popular choice. View the Arm Segments.
4. Three clamp sets, #AC-CS or #AC-CSF (AC-CSF not recommended for large, heavy strobes). View the Clamp Sets.


- Add #AC-SEK Clamp Set with built-in Sekonic Light Meter Bracket. View the Sekonic Brackets.

- Use the Ikelite Remote TTL Slave with the Complete Arm Set - Requires:
1- #AC-TCS Triple clamp - (substitute for 1- AC-CS)
1- #AD-TTL Ikelite TTL Remote Slave or Flash Controller Adapter
View the TTL Slave Adapter Setup.

Strobe Adapter - Specify strobe manufacturer and model. View the Strobe Adapters.

Other Ultra Light accessories that are very well matched to Nexus housings are:

AC-LR Lens Removal Tool for depressing the lens release button of the camera to change lenses without removing camera from housing. Ultralight Lens Removal Tool
AC-FB Bracket to mount accessories such as dive lights or Sekonic Light Meter to Nexus housing handle . Sekonic Mount.

Port Ring adapter to mount an Ultra Light Focus Light Holder to a Nexus Port Ring Vertical Stay.

This Port Ring Adapter combined with an Ultra Light Clamp Set AC-CS or AC-CSF and a Focus Light Holder, either AC-USL will provide an easily adjusted focus light to keep subjects illuminated for low light or night photography.

UL BA-PR Port RIng Adapter


Focus Light Holder that accommodates many AA and C cell dive lights and will connect with an Ultra Light Clamp Set to an Ultra Light ball adapter mounted on a camera tray or housing, or a Ultra Light Nexus Port Ring Adapter (see above item). Two wide rubber bands are included to put around the body of the focus light to keep it securely in the light holder. AD-USL Light Holder.

Additional Ultra Light items for housed cameras and Nikonos cameras can be found on the UltraLight Catalog page.


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© 1998-2001, Deborah Fugitt, City Seahorse, Inc. All rights reserved. No one, for any reason, is permitted to copy the photos, graphics or text on these pages without written permission from City Seahorse, Inc. and Nexus America. In the event that an infringement is discovered you will be notified and invoiced the industry standard TRIPLE FEE for unauthorized usage and/or prosecuted for Copyright Infringement in U.S. Federal Court where you will be subject to pay our court costs and attorneys' fees as well as a fine of US$150,000 statutory damages. Write for permission or information.