The YN-600EX-RT II speedlight, compatible with wireless radio transmission system of Canon 600EX-RT, and transmitters Speedlite ST-E3-RT and YN-E3-RT. It can work as Master or Slave, in TTL or Manual mode. The speedlight has also two photocell modes, on first flash and with preflashes omitting (S1, S2).

Features of YN-600EX-RT II:

• compatible with Canon RT wireless radio transmission system
• support 3 groups control
• support HSS (High Speed Sync) mode, synchronization with shutter speed up to 1/8000s
• guide number GN 60
• AF support
• zoom 20-200mm
• support E-TTL i E-TTL II
• auto save of current settings
• external battery pack socket - CP-E3 and CP-E4
• USB interface, for firmware upgrade

Specification:

• guide number: 60 (ISO 100, zoom 200 mm)
• work modes: TTL, Manual, MULTI, GR
• HSS - synchronization with shutter speed up to 1/8000s
• flash output adjusting: 1/1 - 1/128 (29 levels with step 1/3EV)
• zoom: auto/manual 20 / 24 / 28 / 35 / 50 / 70 / 80 / 105 / 135 / 200mm
• flash duration time: 1/200 - 1/20000s
• colour temperature: 5600K
• recharge time: up to 3s
• work groups: A/B/C
• FEC, FEB
• 1st and 2nd curtain synchronization
• FE Lock
• flash head adjusting range: vertical -7° to 90°, horizontal 0° to 360°
• synchro PC socket
• battery pack socket
• USB socket for firmware upgrade
• built in diffuser and deflector
• overheat protection
• beeper
• power supply: 4 x AA (batteries or rechageable batteries R6/AA Ni-MH)
• dimmensions: 62 x 78 x 205mm
• weight: 430g (without batteries)

The kit includes:

• speedlight YN-600EX-RT II
• cover
• mini stand with 1/4” thread
• user manual

The speedlight does not work in 603 and 622 mode.