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Optical YS Converter/N1 for MDX Housing (For Nikon MDX-D7100/D810)

Optical YS Converter/N1 for MDX Housing (For Nikon MDX-D7100/D810)

Product SKU : SS-50126

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A compact unit that converts the camera's TTL signal to a light signal. The converter can be mounted on the camera's accessory shoe and can be connected to (a) SEA&SEA strobe(s) with Fiber-Optic Cable(s) (*). TTL and manual modes can be switched by pushing the mode switch on the housing.

* SEA&SEA's Fiber-Optic Cable II must be used with an Optical YS Converter.


Compatible housingsMDX-Z7 MDX-D850 MDX-D810 MDX-D7100 MDX-D500



[Controls] Power ON/Power OFF/TTL mode (indicated by blue lamp)/Manual mode (indicated by green lamp)

* Remaining battery level is indicated by flashing LED lamp.

[Auto Power Off]  The converter will automatically power off if the shutter lever or the mode switch is not activated for more than one hour.

* The converter can be re-activated by pressing the mode switch.

[Power Source] 2 x AAA battery (Alkaline: 3.0V / Ni-MH: 2.4V)

[Power Source] (*1) Alkaline: 15 hours / Mi-MH: 12 hours  (*2)

[Construction] Aluminum alloy (case)

[Dimensions (WxHxD)] 54.4 x 39.5 x 53.3mm / 2.1 x 1.6 x 2.1 inches  (without cable)

[Weight] 54g / 5.4oz.

(Housing(s) compatible with Optical YS Converter/N1):  MDX-D7100

*1 Operating time depends on the battery brand, temperature and frequency of use.

*2 Operating time tested on 750 mAh batteries.


Movie on “How to Fit the Optical YS Converter in a Compatible Housing” has just been posted on YouTube.

Sea&Sea Optical Converter Firmware Update for YS-D3


Sea&Sea has now released firmware for updating existing S&S Optical Converts already in the field to enable YS-D3 compatibility.

In order to update existing S&S Optical Converters, please contact your local Sea&Sea Dealer or Sea&Sea Distributor.

Please note that the YS-110α position is utilized on existing Optical Converters for YS-D3 functioning.


The following Optical Converters, shipping from October 2020, are updated for D3 compatibility. Updated Optical Converters are distinguished by a “D3” position.


Note: After completing the update on existing units in the field and all Optical converters shipping after October 2020 will not be compatible with the YS-110αstrobes.

Shipping & Payment

Delivery Options

  • SF Express (Shipping Fee Paid on Delivery)
  • S.F. Express - EF Locker Pickup
  • Office Pick-up
  • S.F. Express - Store Pickup
  • S.F. Express - Circle K Store Pickup
  • S.F. Express - 7-11 Store Pickup
  • S.F. Express - Office / Home Delivery
  • International Delivery (EMS Speedpost)

Payment Options

  • Alipay (HK)_SHOPLINE Payments
  • Credit Card
  • Paypal (+ 5% Service Charge)
  • Bank Transfer / FPS
  • WeChat Pay
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