The Sekonic L-858D is kitted wiht RT-GX Transmitter module. The RT-GX is a user-replaceable radio module that fits neatly next to the batteries in the SPEEDMASTER L-858D Light Meter.Less ThanBrGreater ThanThis kit brings a fully integrated light metering workflow to Godox users, making it possible for them to measure effortlessly, control, and analyze the characteristics of flash like never before. The Sekonic RT-GX simplifies the process of lighting a portrait, analyzing a scene and helping you quickly dial in your lighting recipe to get to your final image with exacting precision.Less ThanBrGreater ThanSekonic Speedmaster L-858D-U is the world's first multi-function, multi-brand wireless triggering light meter. It is the first of its kind capable of measuring flash duration and brief flash bursts like you find from HSS (High Speed Sync) for precision flash control.Less ThanBrGreater ThanFeaturesLess ThanBrGreater ThanFull Radio CompatibilityThe L-858D with the RT-GX transmitter module enables you to call upon all 32 channels (1-32), 16 groups (A-F,0-9) and Wireless ID's to remotely trigger their Godox compatible lights up to 100ft (30 meters) away. You can even wirelessly control the power of modeling lights as well.Less ThanBrGreater ThanLess ThanBrGreater ThanHSS Flash MeteringGodox users can now measure the power of HSS. No need to guess what your exposure is when using High-Speed Sync. Tell the meter your ISO and shutter speed, and it will do the rest.Less ThanBr

Illuminance Range: 0.1 to 2,000,000 lux. Measuring Range: -5 to 22.9 EV (ISO 100). 1 Degree Spot Metering with Viewfinder. Incident Metering for Ambient & Flash. RT-GX Transmitter Module - Lens Cap - Strap - Soft Case - Start Up Guide - Anti-Glare Film - Sekonic 1 Year Limited Warranty with 2 Year Extension Upon Online Registration.

Manufacturer: Sekonic. Date First Available: November 4, 2020. Best Sellers Rank: #76 in Photographic Light Meters. Customer Reviews: 4.3 out of 5 stars 14 ratings 4.3 out of 5 stars. Item model number: L-858D-U SPEEDMASTER. : B08MQPB76V. Item Weight: 1 pounds. Product Dimensions: 6.93 x 3.7 x 1.93 inches.