Introduction

The Canon Speedlite Transmitter ST-E3-RT is a transmitter for wireless flash shooting. It can control up to 5 groups (15 units) of Canon Speedlites that have a wireless multiple flash shooting function using radio transmission. The transmitter also has dust and water resistance equivalent to EOS-1D series cameras.

Read this instruction manual while also referring to the instruction manuals of your camera and Speedlite.

Before using the transmitter, read this instruction manual and the instruction manuals of your camera and Speedlite to familiarize yourself with the operations.

Using the transmitter with a Camera

Using with an EOS digital camera (Type-A camera)

•You can perform wireless autoflash shooting with easy operations.

Using with an EOS film camera

•When using with an EOS film camera compatible with E-TTL II and E-TTL autoflash systems (Type-A camera), you can perform autoflash shooting with easy operations.

•This unit cannot be used with an EOS film camera with TTL autoflash system (Type-B camera).

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