Inspiring Divers to Become Photographers

Sea & Sea Underwater Strobe YS-250PRO TTL (DOES NOT INCLUDE SYNC CORD)

SKU: SS-03108A
Orders ship out of Blaine, WA

Availability: Out of stock


Sea & Sea YS-250PRO Underwater Strobe/Flash Head
Part SS-03108A

* * * The UW Strobe for the Professionals! * * *

This Strobe set is suitable for ALL DSLR UW housings made by any manufacturer

1 x Sea & Sea YS-250PRO Strobe/Flash Head
1 x Ni-MH Battery Pack
1 x Battery Charger
1 x Diffuser
1 x Arm Fixing Bolt
1 x Sensor Plug
1 x Silicon Grease
1 x O-Ring Installed

The YS-250PRO (part SS-03108A) does NOT come with an arm set.
Sea & Sea recommends using the Sea & Sea Arm VII Set with Tray (part SS-22104)
Check our listing for this arm & try set or contact us for more info

  • The Sea & Sea YS-250PRO is designed for the professionals. The strobe is packed with features to meet the challenges of digital photography in the underwater environment.
  • The YS-250PRO has a bright 1 watt LED target light This shows precisely where the strobe is pointed
    it is also bright enough to be used as a dive light on night dives.
    The target light automatically turns off momentarily when the strobe flashes.
  • The strobe features a large circular arc tube that emits a powerful flash at guide number 32 (its value on land / ISO 100 / m) when power is set to full.
  •  The strobe provides incremental manual flash power adjustment in 12 steps for fine adjustment of light. It also works in TTL mode with the converter for the YS-250PRO.
  • The YS-250PRO is lightning fast: it recycles in one second. The high-capacity Ni-MH battery is designed exclusively for the strobe. It stores enough power when fully charged for 300 full flashes.
  • The strobe also features a high-luminosity white LED target light in the center of the strobe. This shows precisely where the strobe is pointed.
  • It has a Ready Lamp and TTL lamp on each side of the strobe to indicate when the strobe is charged and when it is being controlled by the camera's TTL. An audible signal sounds when the ready lamp lights, so you can concentrate on your subject in the viewfinder and know precisely when the strobe is ready to fire again.
  • The YS-250PRO includes other sophisticated features such as two fiber-optic cable sockets and pre-flash cancellation that handles up to two pre-flashes from the camera.
  • Slave mode allows the strobe to be used in cordless dual-strobe or multi-strobe photography


  • Depth Rating:  200 feet (60 m)
  • Guide Number:  32 (ISO 100/m)
  • Coverage Angle:  105° X 105°
  • Flash Modes:  Manual, Slave, TTL with YS-250PRO converter
  • Cable Connections:  Connects with a fiber optic cable or Nikonos 5 pin sync cord
  • Exposure Control:  12 step guide number control
  • Slave:  Yes, can work as a Slave
  • Targeting Light: Yes, 1 Watt LED turns off when flash fires
  • Audible Signal:  Yes
  • Color Temperature:  5600° K; With diffuser: 5200° K
  • Recycle Time:  1 Second
  • Number of Flashes: 300 (when fully charged)
  • Power Source:  High-capacity Ni-MH battery (INCLUDED)
  • Weight:  Land 4.37 lbs (1.98 kg); Underwater: -0.40 lbs (-180 g)


Recommended Accessories

Arm & Try set for the YS-250Pro:

    • Sea & Sea Arm VII Set with Tray (part SS-22104)

Sync and Fiber Cables for the YS-250Pro:

  • Sync Cord (5-Pin) for YS Series Strobes to Nikonos Bulkhead (for housings with a TTL bulkhead) (part SS-17100)
  • Fiber Optic Sync Cable L-Type for Slave Strobes and Sea & Sea Cameras (part SS-50107)

Converters for Sea&Sea DSLR Housings
Converters allow TTL exposure control when connected to Sea&Sea DSLR cameras. The converter is compatible with all Sea & Sea YS strobes including the YS-100 and the YS-250Pro

  • YS TTL Converter for Sea&Sea Nikon DSLR Cameras (part SS-50117)
  • YS TTL Converter for Sea&Sea Canon DSLR Cameras (Part SS-50118)
Stock 0
Lead Time 45
Popularity -1
Warranty Note Limited 3 Years by Sea & Sea
Camera Brand Universal
Warranty & Returns

Manufacturer Warranty: Limited 3 Years by Sea & Sea

Warranty Terms

Mozaik is an authorized dealer of each and every brand offered for sale.  All products are sold with a manufacturer’s warranty. The terms, limitations and period of the warranty are solely determined by the manufacturer and are marked on the product page and/or on the manufacturer’s web site.

Implementing the warranty can be done either through us or directly with the manufacturer.  We are always here to help with any issue that may arise and will be happy to take care of any repairs or check-ups for you.  Read more..

Return Policy

If for any reason you are not satisfied with a product you purchased you can request to return it within 60 days of the original delivery date, subject to the following conditions Read more..

Taxes and Cross-Border

Canadian Customers

All orders shipping to Canada will be charged local sales tax according to the province ( GST / PST / HST). 

Mozaik is responsible and will pay all import fees (including duty and brokerage fees). Our broker will take care of any such fees before the product reaches your door.
Any accidental charges will be reimbursed.

US Customers

Orders shipping to the USA will ship through our US logistics center in Blaine, WA thus free of any border fees. 

International Customers

We do not charge taxes, yet, you may be subject to local sales tax and customs duties in your country.