Web Content Viewer


Speedlite 550EX

Support Flashes

Speedlite 550EX Kit Contents

Speedlite 550EX Kit Contents Speedlite 550EX Soft Case 550EX Shoe Stand Instruction Book Warranty Card




Direct- sync, shoe-mount flash with E-TTL/TTL autoflash control and wireless transmission/reception (E-TTL preflash, AF-assist beam, auto zoom, and bounce flash).

Compatible Cameras

Type-A EOS cameras (for E-TTL autoflash control). Type-B EOS cameras (for TTL autoflash control).

Guide Number

Normal Mode (ISO 100)High-Speed Sync (FP Flash, ISO 100)

Flash Coverage

Auto zoom head covers 24mm, 28mm, 35mm, 50mm, 70mm, 80mm, and 105mm lens focal lengths automatically.
Manual zoom: Enabled with zoom button.
Wide panel: When the built-in wide panel covers the flash head, flash coverage is extended for 17mm lens local length.

Number of Flashes

Recycling Time

Flash Duration

0.2 ms or less. For quick flash: 2.3 ms or shorter.

Sync Speed

According to camera.

Flash Range

With 50mm f/1.4 lens (at ISO 100):
With normal flash: 0.5-30 meters/ 1.6- 100 feet
With quick flash: Min. 0.5 - 7.5 meters and max. 0.5 - 21 meters/: Min. 1.6 - 25 feet and max. 1.6 - 70 feet
With high- speed sync: 0.5 - 15 meters/ 1.6 - 49 feet (at 1/250 sec.)

Flash Modes

Normal flash; Quick flash; High-speed sync (FP flash); Stroboscopic flash: 41 flash frequency settings, 31 firing settings; Preflash: Obtains exposure reading for E-TTL autoflash control; Test flash: With test firing button; Modeling flash: Fired with the EOS-3's depth-of-field preview button

Exposure Control Modes

E-TTL autoflash (with Type-A cameras)
TTL autoflash (with Type-B cameras)

Flash Metering System

1. E-TTL autoflash with instant metering using a preflash (with Type-A cameras).
2. E-TTL autoflash with instant partial metering using a preflash (with Type-A cameras). 3. E-TTL autoflash with instant spot metering using a preflash (with Type-A cameras).
4. TTL off-the-film autoflash metering (with Type-B cameras).

Flash Exposure Compensation

1. Automatic flash output reduction for fill flash.
2. Flash exposure compensation adjustable manually with the Speedlite up to +/-3 stops in 1/3- or 1/2- stop increments.
3. Flash exposure compensation adjustable manually up to ±3 stops in 1/3- or 1/2- stop increments with cameras equipped with flash exposure compensation function.

Flash Exposure Bracketing

Set with the Speedlite up to +/-3 stops in 1/3-stop or 1/2-stop increments.

Flash Exposure Confirmation

Yellow-green pilot lamp lights.

Flash-ready Indication

Red pilot lamp indicates normal flash ready.
Green pilot lamp indicates quick flash ready.

AF Assist Beam

Linked to area AF (45 focusing points), effective from approx. 0.6 to 10 meters / 2 to 33 feet at the center and 0.6 to 5 meters / 2 to 16 feet along the periphery (in total darkness).

Bounce Positions

Custom Functions

Wireless Functions

Transmission System

Optical pulse transmission


Camera, master unit, and slave unit(s)

Wireless Switchover

With wireless selector

Wireless Selector Positions

OFF, Master, Slave


4 (Master unit)

Transmission Angle

Horizontal: Approx. 80° / Vertical: Approx. 60° (At M 24 mm zoom setting) (Manual zooming of flash head also enabled)

Transmission Range

Indoors: Approx. 12 to 15 meters / 39.3 to 49.2 feet Outdoors: Approx. 8 to 10 meters / 26.2 to 32.8 feet

Number of Transmissions

Approx. 1500 (without master unit firing)

Controllable Slaves

A, B, C (3 groups)

Flash Control

1. E- TTL autoflash (with Type-A cameras) High-speed sync (FP flash) / FE lock / flash exposure compensation / FEB / flash ratio control
2. Manual flash (with Type A and B cameras)
3. Stroboscopic flash (with Type A and B cameras)

Flash Ratio Control

A:B = 8:1 to 1:1 or 1:1 to 1:8 (In thirteen 1/2-stop increments) (For C, flash exposure compensation can be set up to +/-3 stops in 1/3 or 1/2-stop increments.)

Master Flash

ON/OFF possible (When ON, automatic set as slave unit A.) (Slave unit)

Reception Angle

Horizontal: Approx. 80°/ Vertical: Approx. 60°

Flash Coverage

Set automatically to M 24mm (Manual zooming of flash head also enabled)

Flash-ready Indication

AF-assist beam emitter blinks

Flash Modes

1. Controlled automatically by master unit
2. Manual flash and stroboscopic flash settable independently from master unit.

Flash Exposure Compensation

Settable individually with each slave unit up to +/-±3 stops in 1/3- or 1/2-stop increments.

Slave Operation Confirmation

Enabled with master unit's test firing button.

Slave Unit SE Mode Cancellation

While the slave unit's SE mode is in effect, the slave unit turns on when a flash is fired. The slave unit's SE mode can be canceled by the following wireless operations:
1. When the master unit's test firing button is pressed.
2. When the camera's FE lock button is pressed.


Power Source

Size-AA alkaline LR6 batteries (6 V) x 4; Size-AA Nicad KR 15/51 batteries x 4 Size-AA Lithium FR6 batteries (6 V) x 4

External Power Source

Compact Battery Pack CP-E2 Size-AA alkaline LR6 (AM-3) batteries (9 V) x 6; Transistor Pack E Battery Magazine TP with size-C alkaline LR14 (AM-2) batteries (9 V) x 6 Ni-Cd Pack TP (NR-SC Ni- Cd batteries x 6 in sealed pack)

SE Mode

With the power switch set to SE, the Speedlite enters the SE mode as follows:
1. On-camera master unit enters the SE mode after 90 sec. of non-use.
2. Slave unit enters SE mode after 60 min. (or 10 min. with CF-4) of non-use.


80 (W) x 138 (H) x 112 (D) mm/ 3.1 (W) x 5.4 (H) x 4.4 (D) in


405g / 14.2 oz

Compatible Supplies & Accessories

Canon offers a wide range of compatible supplies and accessories that can enhance your user experience with you Speedlite 550EX that you can purchase direct. Scroll down to easily select items to add to your shopping cart for a faster, easier checkout. Visit the Canon Online Store



Expand All



† Prices and specifications subject to change without notice. Actual prices are determined by individual dealers and may vary.

 Return to Top