Specifications

Type

Type Shoe-mount E-TTL II/E-TTL autoflash Speedlite
Compatible cameras

EOS R series cameras with a multi-function shoe

For details, refer to the Canon website ().

Flash head (light-emitting unit)

Guide number

Normal flash guide number

Maximum guide number (at approx. ISO 100)

Light distribution Unit Flash coverage
14 mm*1 24 mm 28 mm 35 mm 50 mm 70 mm 80 mm 105 mm
Standard m 12.1 20.7 22.2 25.2 29.6 36.1 37.3 40.5
ft. 39.7 67.9 72.8 82.7 97.1 118.4 122.4 132.9
Guide number priority m 24.1 25.2 29.6 36.1 40.5 40.5 40.5
ft. 79.1 82.7 97.1 118.4 132.9 132.9 132.9
Even coverage m 20.7 20.7 20.7 24.1 26.9 29.6 32.5
ft. 67.9 67.9 67.9 79.1 88.3 97.1 106.6

1: When using the wide panel

High-speed sync guide number

Maximum guide number (at approx. ISO 100)

Shutter speed Unit Flash coverage
14 mm*1 24 mm 28 mm 35 mm 50 mm 70 mm 80 mm 105 mm
1/125 m 7.5 12.5 13.4 15.2 17.8 21.8 22.5 24.4
ft. 24.6 41.0 44.0 49.9 58.4 71.5 73.8 80.1
1/250 m 6.0 9.9 10.6 12.1 14.2 17.3 17.9 19.4
ft. 19.7 32.5 34.8 39.7 46.6 56.8 58.7 63.6
1/500 m 4.2 7.0 7.5 8.5 10.0 12.2 12.6 13.7
ft. 13.8 23.0 24.6 27.9 32.8 40.0 41.3 44.9
1/1000 m 3.0 5.0 5.3 6.0 7.1 8.6 8.9 9.7
ft. 9.8 16.4 17.4 19.7 23.3 28.2 29.2 31.8
1/2000 m 2.1 3.5 3.8 4.3 5.0 6.1 6.3 6.9
ft. 6.9 11.5 12.5 14.1 16.4 20.0 20.7 22.6
1/4000 m 1.5 2.5 2.7 3.0 3.5 4.3 4.5 4.8
ft. 4.9 8.2 8.9 9.8 11.5 14.1 14.8 15.7
1/8000 m 1.1 1.8 1.9 2.1 2.5 3.1 3.2 3.4
ft. 3.6 5.9 6.2 6.9 8.2 10.2 10.5 11.2

1: When using the wide panel

Manual flash guide number

Maximum guide number (at approx. ISO 100)

Flash output Unit Flash coverage
14 mm*1 24 mm 28 mm 35 mm 50 mm 70 mm 80 mm 105 mm
1/1 m 12.1 20.7 22.2 25.2 29.6 36.1 37.3 40.5
ft. 39.7 67.9 72.8 82.7 97.1 118.4 122.4 132.9
1/2 m 8.6 14.6 15.7 17.8 20.9 25.5 26.4 28.6
ft. 28.2 47.9 51.5 58.4 68.6 83.7 86.6 93.8
1/4 m 6.1 10.4 11.1 12.6 14.8 18.1 18.7 20.3
ft. 20.0 34.1 36.4 41.3 48.6 59.4 61.4 66.6
1/8 m 4.3 7.3 7.8 8.9 10.5 12.8 13.2 14.3
ft. 14.1 24.0 25.6 29.2 34.4 42.0 43.3 46.9
1/16 m 3.0 5.2 5.6 6.3 7.4 9.0 9.3 10.1
ft. 9.8 17.1 18.4 20.7 24.3 29.5 30.5 33.1
1/32 m 2.1 3.7 3.9 4.5 5.2 6.4 6.6 7.2
ft. 6.9 12.1 12.8 14.8 17.1 21.0 21.7 23.6
1/64 m 1.5 2.6 2.8 3.2 3.7 4.5 4.7 5.1
ft. 4.9 8.5 9.2 10.5 12.1 14.8 15.4 16.7
1/128 m 1.1 1.8 2.0 2.2 2.6 3.2 3.3 3.6
ft. 3.6 5.9 6.6 7.2 8.5 10.5 10.8 11.8
1/256*2 m 0.8 1.3 1.4 1.6 1.9 2.3 2.3 2.5
ft. 2.6 4.3 4.6 5.2 6.2 7.5 7.5 8.2
1/512*2 m 0.5 0.9 1.0 1.1 1.3 1.6 1.6 1.8
ft. 1.6 3.0 3.3 3.6 4.3 5.2 5.2 5.9
1/1024*2 m 0.4 0.6 0.7 0.8 0.9 1.1 1.2 1.3
ft. 1.3 2.0 2.3 2.6 3.0 3.6 3.9 4.3

1: When using the wide panel

2: Not available with high-speed sync
Flash coverage
(focal length; for 35mm full-frame)
14 mm

Wide panel: Manual

* Not compatible with EF15mm f/2.8 Fisheye or EF8-15mm f/4L Fisheye USM shooting angles of view
24 mm

Zoom

  • Auto

    Flash coverage is set automatically, accounting for [Auto zoom for sensor size] and [Light distribution] settings at the lens focal length

  • Manual

    Flash coverage is set manually

    * [Auto zoom for sensor size] and [Light distribution] settings are not taken into account
28 mm
35 mm
50 mm
70 mm
80 mm
105 mm
Bounce angle
Bounce direction Bounce angle (approx.)
Up 0° 45° 60° 75° 90°
Left 0° 60° 75° 90° 120° 150°
Right 0° 60° 75° 90° 120° 150° 180°

Click stops at the angles above.

Downward bounce is not possible.
Flash duration

  • Normal flash

    Flash output Flash duration (approx., sec.) Flash output Flash duration (approx., sec.)
    1/1 1/790 1/64 1/12030
    1/2 1/1440 1/128 1/14430
    1/4 1/2830 1/256 1/17290
    1/8 1/4830 1/512 1/19400
    1/16 1/7370 1/1024 1/21190
    1/32 1/10110
Color temperature information transmission

Supported

Exposure control

Flash modes (exposure control modes)

Flash modes and available functions

Flash mode Mounted Radio transmission wireless
E-TTL II/E-TTL autoflash*1 ○ ○
Manual flash ○ ○
Custom flash Following the registered flash mode
Group firing ― ○

1: Set automatically when the camera shooting mode is set to Basic Zone modes.
Effective flash range

Effective flash range is as follows under these conditions:

  • Sensor size: 35mm full-frame
  • Flash coverage: 50 mm
  • Aperture value: f/1.4
  • ISO 100
  • Light distribution: Standard
Firing conditions Effective flash range (approx.)
Normal flash
(Flash-ready lamp: lit in red)		 0.7–22.1 m / 2.3–72.5 ft.
Quick flash
(Flash-ready lamp: blinking in red)		 0.7–12.9 m / 2.3–42.3 ft.
High-speed sync
(Shutter speed: 1/250 sec.)		 0.7–10.1 m / 2.3–33.1 ft.
Flash exposure compensation

±3 stops (in 1/3-stop or 1/2-stop increments)

Speedlite flash exposure compensation takes precedence if compensation is also set on the camera.

Speedlite flash exposure compensation should be set to 0 to enable flash exposure compensation by the camera.
FEB

Not available

FEB possible when used as a receiver.
FE lock Supported
FE memory Supported
Synchronization
Flash firing Flash mode 1st-curtain sync 2nd-curtain sync High-speed sync
Mounted
(Wireless OFF)		 E-TTL II/E-TTL autoflash ○ ○ ○
Manual flash ○ ○ ○
Radio transmission
wireless sender		 E-TTL II/E-TTL autoflash ○ ○ ○
Manual flash ○ ○ ○
Group firing ○ ○ ○

Flash recharge

Recharge time
Recharge time (approx.)
Battery Quick flash Normal flash
AA / LR6 alkaline batteries 0.1–2.2 sec. 0.1–2.5 sec.
Size AA Ni-MH batteries 0.1–1.3 sec. 0.1–1.5 sec.

Using new batteries, based on Canon testing standards.

Based on Canon testing standards.
Flash-ready indication
Charging in progress Quick flash Normal flash
(fully charged)
Flash-ready lamp Off Blinking in red (8 Hz) Lit in red
LCD Panel CHARGE
6-level display		 ― ―

AF-assist beam

Intermittent flash firing mode

The intermittent AF-assist beam is not fired under the following conditions:

- Lens attached: Manual focus (MF)

- Camera: Set to [Servo AF], or with [AF-assist beam firing] set to [Disable]

  • Light emitted

    Visible light

  • Compatible AF system

    Dual Pixel CMOS AF

  • Effective range

    Effective range (approx.)
    Center AF point 0.7–10.0 m / 2.3–32.8 ft.

    Lens focal length: 24 mm or longer

    Direction emitted: from the flash head at a 0° bounce angle

Wireless functions via radio transmission

Wireless settings
Sender

Supported

Secondary and additional units serve as sub-senders
Receiver Supported
Communication functions
Standards compliance IEEE 802.15.4, ARIB STD-T66
Communication method Primary modulation: OQPSK
Secondary modulation: DS-SS
Transmission frequency 2405–2475 MHz
Channel Channel 1–15
Setting: Auto/Manual
Wireless radio ID 0000–9999
Setting: Manual
Transmission range*1*2 Approx. 30 m / 98.4 ft.
Groups

Up to 5 groups (A/B/C/D/E)

Sender units are set to Group A
Max. units for communication Up to 16 senders and receivers, combined
Max. sender units

Up to 15

Secondary and additional units serve as sub-senders
Max. receiver units Up to 15

1: Without any obstructions between senders and receivers, and without radio interference from other devices.

2: Transmission range may be shorter depending on factors such as how units are arranged, the surrounding environment, and weather conditions.
Linked functions

Supports linked shooting with automatic shutter release of up to 16 cameras (sender: 1; receivers: 15) linked to shutter release on the sender camera.

Shooting with precisely the same timing is not possible, as receiver cameras shoot slightly after the sender camera shutter release.

Power source

Battery pack

4 × AA/LR6 alkaline batteries

AA/HR6 Ni-MH batteries can be used, AA/FR6 lithium batteries cannot be used.
External power source Not supported
Maximum flash count
Battery Quick flash
AA / LR6 alkaline batteries Approx. 210–1400 times
Size AA Ni-MH batteries Approx. 260–1700 times

Using new batteries, based on Canon testing standards.

Based on Canon testing standards.
Radio transmission wireless shooting time

Approx. 9 hr. continuously

Time until the Speedlite turns off with sender flash firing disabled, when using radio transmission wireless.

Using new AA/LR6 alkaline batteries, based on Canon testing standards.
Auto power off

When EL-10 is attached to a camera, the time from when the camera switches off, or auto power off mode is activated until the Speedlite turns off due to inactivity.

Since the Speedlite can detect the state of the connection with the camera, while the camera is on, it does not (unintentionally) enter auto power off by itself.

Status Custom Function Time
During normal operation C.Fn-01-0 Approx. 90 sec.
When set as a sender in radio transmission wireless operation C.Fn-01-0 Approx. 5 min.
During linked shooting C.Fn-01-0
When set as a receiver in radio transmission wireless operation C.Fn-10-0 Approx. 60 min.
C.Fn-10-1 Approx. 10 min.
Standby before power ON after auto power off when set as a receiver C.Fn-11-0 Approx. 8 hr.
C.Fn-11-1 Approx. 1 hr.

Reactivated in response to the following operations:

  • Pressing the camera shutter button halfway
  • Test flash button
  • When selecting the (Speedlite) menu direct function Camera menu with EL-10 attached to a camera.

Dimensions/weight

Dimensions
W × H × D
Body Approx. 70.6 × 116.3 × 98.3 mm / 2.78 × 4.58 × 3.87 in.
Weight
Weight
Body Approx. 287 g / 10.1 oz.

Operation environment

Working temperature range 0–45°C / 32–113°F
Working humidity 85 % or less
  • All specifications above are based on Canon's testing standards.
  • Product specifications and external appearance are subject to change without notice.