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Small rectangular transmitter module with matte black finish and labelled buttons

Sekonic

Sekonic RT-EL/PX Transmitter Module for L-858D-U Light Meter

SKU CH-7GHM-SHM21

Transmitter module adds Elinchrom Skyport and Phottix Strato II wireless triggering and power control to the L-858D-U light meter

  • Triggers Elinchrom Skyport lighting wirelessly from the L-858D-U meter
  • Controls Elinchrom flash power and modelling lamp directly from the meter
  • Fires Phottix Strato II flashes for measurement via the L-858D-U
  • Selects Phottix groups and triggers flashes using the meter interface
  • Designed specifically for the Sekonic L-858D-U Speedmaster light meter

Transmitter Module for L-858D-U

The Sekonic RT-EL/PX module adds wireless triggering to the L-858D-U Speedmaster light meter. It is designed for photographers who use Elinchrom Skyport or Phottix Strato lighting systems and need integrated meter control. The unit slots directly into the compatible meter for a streamlined workflow.

Thermals Noise and Power Draw

As a passive transmitter module, it draws minimal power from the light meter battery during operation. It generates no audible noise and produces negligible heat while idle or actively triggering flashes. Normal use has no measurable impact on the meter's overall battery life or handling temperature.

Upgrade Path and Compatibility

This module replaces the need for separate trigger units when working with Elinchrom or Phottix gear. The jump is worth it for L-858D-U owners who want to control flash power and modelling lamps directly from the meter interface. It does not support lighting brands outside the Skyport or Strato ecosystems.

How it compares

Measured against everything we stock in Hot-Shoe Flash Units, at today’s prices. Recalculated every night.

Price $153.99
Pricier than about 58% of the 163 comparable items (median $118.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the RT-EL/PX module into my L-858D-U Speedmaster light meter?

Power off the meter, slide the module into the dedicated transmitter slot until it clicks, then power on and select Elinchrom Skyport or Phottix Strato II in the radio menu.

What maintenance will the RT-EL/PX module need over time?

No routine maintenance is required; keep the contacts clean with a dry cloth and store the meter in its case when not in use to protect the module.

What is the first limitation I will hit when triggering Elinchrom or Phottix lights continuously with this module?

The meter's battery life becomes the limiting factor during extended sessions, as the radio transmitter draws additional power from the L-858D-U.

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