Canon Speedlite Transmitter ST-E3-RT Version 3

Canon ST-E3-RT Version 3 Speedlite Transmitter

Take full control of your flash setup with the Canon ST-E3-RT Version 3. Designed for creative photographers, this radio transmitter makes it easy to manage multiple compatible Canon Speedlite flashes and camera bodies from a distance.

With reliable 2.4 GHz radio communication, you can trigger flashes from up to 30 meters away without needing a direct line of sight. That means greater freedom when shooting outdoors, around corners, or in more challenging lighting setups.

Built for advanced wireless lighting

The ST-E3-RT Version 3 supports sophisticated E-TTL II flash metering, helping you achieve accurate exposure with less effort. It can control up to 15 Speedlite flashes across five groups, giving you the flexibility to create anything from simple fill light to complex multi-light setups.

You can also remotely control up to 15 cameras for synchronized shooting, making it a strong choice for studio work, events, and multi-angle setups.

Professional features in a compact design

This transmitter includes a clear backlit LCD screen for easy operation, even in low light. It is also dust- and moisture-resistant, offering dependable performance alongside Canon EOS cameras and L-series lenses in demanding environments.

Powered by two AA/LR6 batteries, it is practical and easy to use on location or in the studio.

Key features

• Wireless RF flash control for compatible Canon Speedlite units
• Reliable operation up to 30 m away
• 2.4 GHz radio frequency for flexible off-camera use
• Supports Canon E-TTL II / E-TTL flash metering
• Controls up to 15 flashes across 5 groups
• Remote camera control for synchronized shooting
• Dust- and moisture-resistant construction
• Wireless second-curtain sync support for EL-1 and EL-5
• Flash output as subtle as 1/8192 for precise lighting control
• High-speed sync (FP) supported
• Manual flash output from 1/1 to 1/128
• Stroboscopic mode with frequencies from 1 to 500 Hz

Specifications

• Manual output settings: 1/1 to 1/128
• Manual step size: 1/3 stop
• Strobe output settings: 1/4 to 1/128
• Number of channels: 15
• Dimensions: 67.4 x 61.5 x 77.4 mm
• Weight: 106 g

In the box

• Canon ST-E3-RT Version 3 Speedlite Transmitter
• Soft case