Exposure Control System: E-TTL auto flash and manual flash
Flash Exposure Compensation (FEC): 3 steps with 1/3 increment each step

Exposure Control System: TTL Manual Flash Remote ETTL (Master or Slave, with Groups) Remote ETTL or Manual Flash TTL (Master or Slave, with Groups)
Remote TTL or Manual Flash (Master or Slave, with Groups) using the Integrated R2 Radio System HSS
Flash Exposure Compensation (FEC): Manual, FEB: +/-3 steps with 1/3 increment each step (Manual FEC and FEB can be combined)
Flash Exposure Lock (FEL): With button or button

Center: 0.6~10m/2.0~32.8 feet
Periphery: 0.6~5m/2.0~16.4 feet

Center: 2.0-32.8' (0.6-10m)
Periphery: 2.0-16.4' (0.6-5m)

3300K±200K

3300K +/-200K

R2 Integrated

Canon EOS cameras (E-TTL II auto flash)

100Ws

76Ws

Auto zoom (flash coverage is set automatically to match the lens focal length and image size)
Manual zoom (28-105mm)
Swinging/tilting flash head (bounce flash): 0 to 330° horizontally and -7° to 120° vertically

28 to 105mm
Auto zoom (flash coverage is set automatically to match the lens focal length and image size)
Manual zoom
Swinging/tilting flash head (bounce flash): 0 to 330 Degree horizontally and -7 Degree to 120 Degree vertically

TTL Flashes

Shoe Mount Flash

1/300 to 1/20,000s (t0.1)

1/300 to 1/20000 seconds

Manual

Not Specified

Round

Swinging/tilting flash head (bounce flash): 0 to 330° horizontally and -7° to 120° vertically

28-105 mm with automatic or manual zoom control Wider, with optional Flashpoint AK-R1 Round Head Accessory Kit

7.2V/2980mAh Li-Ion Rechargeable Battery

7.2V/2980mAh Lithium-ion

7.2V/2980mAh Li-Ion Rechargeable Battery

7.2V/2980mAh Lithium-ion

Approx.1.7seconds. LED indicator wil light up when the flash is ready

Approx. 1.5 seconds. Green LED indicator will light up when the flash is ready.

1/256th power to full power in 1/3 and 1/10th stop increments

2.81" x 2.99" x 8.11" (WxHxD)

6.14 x 2.99 x 4.88" (156 x 76 x 124mm)

With internal battery: 20.5 oz (580g)
Without internal battery: 16.4 oz (466g)

Zoom Li-on X Flash: Without Battery: 16.43 oz (466g)
With Battery: 20.45 oz (580g)
Round Head Flash Accessory Kit: Dome: 0.8 oz (24g)
Bounce: 0.6 oz (18g)
Grid: 0.4 oz (10g)
Filter Holder: 0.3 oz (8g)
Filter/Gel/Wide: 0.02 oz (0.5g)
Snoot: 1.7 oz (30g)

High-speed sync (up to1/8000 seconds), first-curtain sync, and second-curtain sync

High-speed sync (up to 1/8000 seconds), first-curtain sync, and second-curtain sync

Provded (up to 100 times,100Hz)

Provided (up to 100 times, 199Hz)

Sender, Receiver

Transmitter, Receiver, Off

A,B,C,D,E

A,B,C,D,E

A, B, C, D, E (E group can be controlled by R2 series flash trigger)

100m

330' (100m)

32: 01~32

OFF/01~99

OFF/01-99

Fired with camera's depth-of-field preview button

Fired with camera's depth-of-field preview button

2 W

2w

Approx. 400

Provide standby and auto off functions

Power off automatically after approx. 90s of idle use when set as a transmitter unit
Screen sleep automatically after approx. 60min (or 30min) of idle use when set as a receiver unit

Hot shoe, 2.5mm sync cord

Hot shoe, 2.5mm sync cord