





See Options
1 Year
$11.99
2 Year
$17.99
3 Year
$27.99
Need help? Ask our experts.
Review Summary
2022-05-17T12:36:53
Works great. Recommended.
CHARLES J.
2022-04-29T15:07:03
Works as it meant to be ????
MAMOON A.
2021-04-28T08:16:34
This has got a lot of use already to control my AD200s from my light meter. It speeds up workflow considerably especially when you don?t have to keep walking back to the camera to attach and detach the trigger. I am very happy with it
Jonathan H.
2021-04-22T09:50:24
Plug and Play. Everything worked perfectly out of the box. The meter detected the card and I've been using it with no issue.
TOM J.
2021-04-19T08:55:26
This product works like a charm. It makes using a light metter with high speed sync easy. No issues at all with product or shipping. Arrived a day earlier than promised.
DANIEL T.
2021-04-11T18:46:24
I am having a hard time trying to download the firmware to upgrade my flash. If I can get it to work, I think it?ll be great asset to my lighting and camera set up.
PATRICK L.
2021-02-19T09:24:09
Game changer
ANTHONY H.
2021-02-01T13:21:01
fácil de instalar, funciona muy bien
OSCAR V.
2020-12-02T07:44:26
I was able to work around not having this transmitter for years, but now it just works. It saves me time and make my work more streamlined. I don't need a separate remote to trigger the flash.
Mark J.
2020-12-02T07:24:58
I will begin by telling you that it’s a great product. If you are using Flashpoint or Godox strobes, this is a must have product. When you are trying to balance your lighting this makes it easier and faster to determine the amount of light coming from each strobe. Before this unit was available I had put together a clumsy system that took a lot of time and effort to use. One thing the instructions, that comes with the unit, does not tell you is the Firmware must be level 17 for it to work.
Leonard T.
2020-12-01T09:26:06
Fantastic! This makes metering your Godox or Flashpoint strobes or speedlights so easy now. The Sekonic L-858D-U Light Meter just got a whole lot easier to use and is now actually fun to use when measuring light output. I no longer have to carry around a trigger around or constantly have to remove the trigger from the camera hot shoe! I am able to control all of my light groups power and modeling lights all from my light meter now! This a game changer! I would purchase again in an instant! Highly recommend!
RICHARD S.
2020-11-27T07:34:54
Works great! It so awesome to trigger my flashpoint stones & flashes fro my Sekonic L858 light/flash meter!??
Rick G.
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500
Browse our FAQ
Multi-Function
L-858D-U SPEEDMASTER Light Meter
1.2 x 0.4 x 1.2" / 3 x 1 x 3 cm
3.2 oz / 90.7 g
4962294012069
Much needed product
By Leonard T.
I will begin by telling you that it’s a great product. If you are using Flashpoint or Godox strobes, this is a must have product. When you are trying to balance your lighting this makes it easier and faster to determine the amount of light coming from each strobe. Before this unit was available I had put together a clumsy system that took a lot of time and effort to use. One thing the instructions, that comes with the unit, does not tell you is the Firmware must be level 17 for it to work.
Game Changer!
By RICHARD S.
Fantastic! This makes metering your Godox or Flashpoint strobes or speedlights so easy now. The Sekonic L-858D-U Light Meter just got a whole lot easier to use and is now actually fun to use when measuring light output. I no longer have to carry around a trigger around or constantly have to remove the trigger from the camera hot shoe! I am able to control all of my light groups power and modeling lights all from my light meter now! This a game changer! I would purchase again in an instant! ...
View full Review
Find the perfect balance in your photography lighting with the RT-GX Flashpoint and Godox Transmitter Module for the L-858D-U SPEEDMASTER Light Meter. This innovative product, a result of a strategic collaboration between Godox and Sekonic, offers a fully integrated light metering workflow for Godox users. It's designed to revolutionize the way you measure, control, and analyze flash characteristics, making it an essential tool for every professional photographer.
The Sekonic RT-GX is more than just a transmitter module; it's a tool that simplifies the process of crafting the perfect light in every image. It allows you to dial in your lighting recipe swiftly, helping you achieve your final image with exacting precision.
This high-quality module is fully compatible with Godox, offering all 32 channels (1-32), 16 groups (A-F,0-9), and Wireless ID's to remotely trigger your Godox compatible lights from up to 100ft (30 meters) away. You can also wirelessly control the power of modeling lights, adding to its user-friendly features.
With the RT-GX, High-Speed Sync (HSS) flash metering is no longer a guessing game. Simply input your ISO and shutter speed, and the module will do the rest. It also allows you to measure the percentage of flash in your images, ensuring the desired mix of ambient and flash. Plus, you can measure flash duration to understand how much stopping power your lights have, whether you're capturing an athlete in action or a fashion model's flowing gown.
Compact and durable, the RT-GX Flashpoint and Godox Transmitter Module for the L-858D-U SPEEDMASTER Light Meter is a game-changer in the world of professional photography. It's not just a product; it's a community of supportive and active Godox users sharing lighting diagrams, images, and behind-the-scenes setups. With Sekonic, you're not just getting a product; you're joining a community of passionate photographers.