Canon Speedlite 550EX Instruction Manual

Introduction

This manual provides detailed instructions for the proper use and maintenance of your Canon Speedlite 550EX. Please read this manual thoroughly before using the flash unit to ensure safe and optimal performance. Keep this manual for future reference.

Figure 1: Front cover of the Canon Speedlite 550EX Instruction Manual, featuring an image of the Speedlite 550EX flash unit.

Setup

1. Battery Installation

The Speedlite 550EX uses four AA-size alkaline or Ni-MH batteries. Ensure correct polarity when inserting batteries.

1. Open the battery chamber cover located on the side of the flash unit.
2. Insert four AA batteries according to the polarity indicators (+/-).
3. Close the battery chamber cover securely.

2. Attaching to Camera

The Speedlite 550EX can be mounted on a camera's hot shoe.

• Slide the mounting foot of the Speedlite into the camera's hot shoe until it clicks into place.
• Tighten the locking lever to secure the flash unit.
• To detach, loosen the locking lever and slide the flash unit off the hot shoe.

Operating Instructions

1. Power On/Off

To turn the Speedlite on, slide the power switch to the "ON" position. To turn it off, slide the switch to "OFF".

2. Flash Modes

The Speedlite 550EX supports various flash modes, including E-TTL II, E-TTL, TTL, Manual, and Multi (Stroboscopic) flash.

• E-TTL II/E-TTL/TTL: Automatic flash exposure control.
• Manual: Allows setting flash output manually from 1/1 to 1/128 power.
• Multi (Stroboscopic): Fires the flash multiple times during a single exposure.

3. Zoom Head Adjustment

The flash head automatically adjusts its zoom position to match the focal length of the lens. Manual adjustment is also possible.

4. Bounce Flash

The flash head can be tilted upwards and rotated horizontally for bounce flash photography, providing softer, more natural lighting.

• Tilt the flash head up to 90 degrees.
• Rotate the flash head up to 180 degrees to the left and 90 degrees to the right.

Maintenance

1. Cleaning

To maintain the performance and appearance of your Speedlite 550EX:

• Wipe the flash unit with a soft, dry cloth.
• For stubborn dirt, use a cloth lightly dampened with water and then wipe dry.
• Do not use organic solvents such as paint thinner or benzene.

2. Storage

When not in use for extended periods, remove the batteries to prevent leakage and corrosion.

• Store the Speedlite in a cool, dry place, away from direct sunlight and high humidity.
• Avoid storing in areas with extreme temperature fluctuations.

Troubleshooting

If you encounter issues with your Speedlite 550EX, refer to the following common problems and solutions:

If the problem persists after trying these solutions, please contact Canon customer support.

Specifications

Key specifications for the Canon Speedlite 550EX:

• Type: Shoe-mount E-TTL II/E-TTL/TTL automatic flash
• Guide Number: 55 (at 105mm, ISO 100 in meters)
• Flash Coverage: Auto zoom for 24-105mm (17mm with wide panel)
• Bounce Angle: Up 90°, Down 7°, Left 180°, Right 90°
• Power Source: 4 x AA-size alkaline or Ni-MH batteries
• Recycling Time: Approx. 0.1-7 seconds (depending on batteries and power level)
• Dimensions (W x H x D): Approx. 76 x 134 x 108 mm (3.0 x 5.3 x 4.3 in.)
• Weight: Approx. 390 g (13.8 oz.) excluding batteries

Warranty and Support

For information regarding warranty coverage and technical support for your Canon Speedlite 550EX, please refer to the warranty card included with your product or visit the official Canon website. Canon provides comprehensive support resources, including FAQs, driver downloads, and service center locations.

Official Canon Website: www.usa.canon.com