---
product_id: 411712052
title: "Secondic Exposure Meter Speedmaster L-858D Dedicated Transmitter RT-GX (Godox Compatible)"
brand: "sekonic"
price: "5033 kr"
currency: NOK
in_stock: true
category: "Sekonic"
url: https://www.desertcart.no/products/411712052-secondic-exposure-meter-speedmaster-l-858d-dedicated-transmitter-rt-gx
store_origin: NO
region: Norway
---

# Flash time analysis Compact 3.3x1.19x2.79 cm 2.4GHz wireless control Secondic Exposure Meter Speedmaster L-858D Dedicated Transmitter RT-GX (Godox Compatible)

**Brand:** sekonic
**Price:** 5033 kr
**Availability:** ✅ In Stock

## Summary

> ⚡ Master your light, wirelessly and precisely.

## Quick Answers

- **What is this?** Secondic Exposure Meter Speedmaster L-858D Dedicated Transmitter RT-GX (Godox Compatible) by sekonic
- **How much does it cost?** 5033 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/411712052-secondic-exposure-meter-speedmaster-l-858d-dedicated-transmitter-rt-gx)

## Best For

- sekonic enthusiasts

## Why This Product

- Trusted sekonic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Boost Your Studio Workflow:** Transform your Sekonic L-858D into a powerhouse with this dedicated transmitter module.
- • **Ultra-Compact & Lightweight:** At just 40g and pocket-sized, it’s the ultimate portable tool for on-the-go pros.
- • **Seamless Godox Compatibility:** Effortlessly integrates with Godox 2.4GHz wireless system for flawless flash control.
- • **Precision Flash Timing Analysis:** Measure flash duration wirelessly to optimize exposure with scientific accuracy.
- • **Wireless Flash & Light Adjustment:** Control your lighting setup remotely, perfect for dynamic shoots and creative freedom.

## Overview

The Sekonic RT-GX Transmitter Module is a dedicated wireless controller for the L-858D Speedmaster light meter, compatible with Godox’s 2.4GHz system. It enables remote flash and light adjustments plus flash time analysis, all packed into a compact, lightweight design that enhances professional lighting workflows.

## Description

Sekonic RT-GX Flashpoint Transmitter Module for The L-858D-U SPEEDMASTER

## Features

- Dedicated L-858D transmitter compatible with Godox 2.4GHz wireless system
- Remote control allows flash and light adjustment
- You can also measure flash time analysis wirelessly.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08KWMLDLG |
| Best Sellers Rank | #95,756 in Electronics ( See Top 100 in Electronics ) #200 in Shoe-Mount Flashes |
| Item model number | 401-628 |
| Manufacturer | セコニック |
| Product Dimensions | 3.3 x 1.19 x 2.79 cm; 40 g |

## Images

![Secondic Exposure Meter Speedmaster L-858D Dedicated Transmitter RT-GX (Godox Compatible) - Image 1](https://m.media-amazon.com/images/I/81MrGMuN+BL.jpg)

## Frequently Bought Together

- Sekonic Transmitter Module RT-GX for L-858D-U Speedmaster Light Meter
- Sekonic Speedmaster L-858D-U Light Meter (401-858)

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**Shop now:** [https://www.desertcart.no/products/411712052-secondic-exposure-meter-speedmaster-l-858d-dedicated-transmitter-rt-gx](https://www.desertcart.no/products/411712052-secondic-exposure-meter-speedmaster-l-858d-dedicated-transmitter-rt-gx)

---

*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-16*