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Photo Accessories

Speedlite 430EX III-RT: <br class="br_visual" />a portable, powerful flash that’s easy to use

Speedlite 430EX III-RT:
a portable, powerful flash that’s easy to use


Using many of the functions found on the flagship Speedlite 600EX-RT flashgun, the Speedlite 430EX III-RT is a smaller unit that’s powerful, versatile and portable. Radio-frequency triggering makes off-camera operation easy to perform and opens up new ways to light your subjects more creatively.

Who is it for?

Designed for enthusiast photographers looking for a small yet highly versatile creative flashgun, the Speedlite 430EX III-RT offers high levels of performance as an all-in-one unit and appeals also to professionals looking for an off-camera flash with full Canon connectivity thanks to radio-frequency triggering. Simple controls and an intuitive interface make it easy to use in all conditions and with controls that echo the design of the EOS camera, users of all abilities will be able to fully exploit its potential.

Key features


  • High performance Speedlite with maximum Guide Number of 43 (metres/ISO 100)
  • Wide lens coverage from 24mm to 105mm (plus 14mm via adapter)
  • Wireless radio slave/master (transmitter / receiver)
  • Wireless optical slave
  • Radio camera remote control shooting function
  • Fast, silent recycle times
  • Powered by four AA/LR6 batteries (Ni-MH or lithium)
  • Colour Filter attachment
  • Bounce adapter included
  • Dot matrix LCD display

Simple controls and an intuitive interface

An illuminated display is easy to read in all conditions with familiar controls that echo the design of your EOS camera. Shortcut buttons and a control wheel provide fast access to settings.

A power switch and a pilot lamp are configured similar to that of the Speedlite 600EX III-RT. The power switch has a Lock position to prevent accidental operation and allows the user to lock out all operations except for the power switch. Even when the power switch is set to the Lock position, a test flash can be performed and the LCD can still be illuminated.

The new 172×72 dot LCD panel displays all the flash settings and is very easy to read. The dot-matrix display enables a display of characters for more detailed information. With many EOS cameras you can also set the flash functions from the camera menu screen and include the flash Quick Control screen which first appeared on the EOS-1D X.

Use remote flash to create the look you want

Simulate light coming from different directions by situating the Speedlite 430EX III-RT away from the camera. In slave mode, the Speedlite 430EX III-RT can be fired remotely by either optical or radio triggering from a distance. Acting as a master, the Speedlite 430EX III-RT can control up to five groups of RT-series flashes, with up to 15 units in total.

Shoot flattering portraits using bounced light

A movable flash head allows light to be bounced from large surfaces, such as walls and ceilings, for a soft, shadowless result that will show your subject at their best. The supplied Bounce Adapter softens light further, spreading it over a wider area for even more diffuse results.

A built-in zoom head aims to match the angle of the flash’s output to the viewing angle of the lens being used, and operates across a 24-105mm zoom range (full frame equivalent). A built in wide diffuser panel can be deployed to match the Speedlite 430EX III-RT to a 14mm lens. Flash coverage can also be varied manually.

The included warm-up colour filter helps balance the colour temperature of the flash’s light with that of an indoor background, for more natural mixing of flash and ambient light.

Integrates with other Speedlites as part of the EOS Family

Using the optional Speedlite Transmitter ST-E3-RT, or a second RT-series Speedlite, the Speedlite 430EX III-RT can be triggered from up to 30m away, even when there is no direct line of sight. This allows it to be positioned in more places – such as behind trees or around corners – giving you extra creative options.

With optical triggering, the Speedlite 430EX III-RT can be controlled using the built-in Integrated Speedlite Transmitter found on many EOS cameras, or the optional Speedlite Transmitter ST-E2, so you’ll up and running straight away.

Multiple Speedlite 430EX III-RT units can be used together (or with other Canon Speedlites) to create exciting lighting effects. Flashes can be grouped together and the brightness of each group can be adjusted. A maximum of five groups can be set up, with up to 15 flashes in total.

With its Remote-release function, the Speedlite 430EX III-RT can be also used to trigger your EOS camera. This lets you hold the flash off-camera, in hard-to-reach positions, and still take pictures. Linked shooting lets a camera-mounted Speedlite 430EX III-RT trigger other compatible cameras as you shoot, enabling you to capture the same moment from different angles.

Powerful, yet compact enough to take anywhere

Weighing in at just 295g, the Speedlite 430EX III-RT is portable enough to always have a place in your bag. Yet despite its small size it packs a punch, having a maximum Guide Number of 43 (metres/ISO 100) and recycling from a full-power discharge in only 3.2s.

Dual wireless flash triggering

The Speedlite 430EX III-RT can be fired while off-camera using radio-frequency or optical triggering, giving photographers huge versatility. When using radio-frequency triggering, flashes can be placed up to 30m away from the camera and do not have to be within direct line of site. This means they can be placed in many more locations, such as outside a room firing in through a window.

Optical triggering allows EOS cameras featuring a built-in Integrated Speedlite Transmitter (e.g. EOS 760D, EOS 70D and EOS 7D Mark II) to fire the Speedlite 430EX III-RT from up to 10m away, without the need for extra equipment.

Technical product specifications are currently unavailable.