This GODOX TT520 ThinkLite Speedlite Flash is compatible with any camera with the standard hot shoe such as Canon, Nikon, Pentax etc.

(1) Switch to the ON, the flash will start charging (the charging indicator is dim). After several seconds, the charging indicator turns red and TT520 is ready to shoot.
(2) For a test flash, press the test button. After use, press the ON/OFF to OFF to power off.
(3) If the red charging indicator lamp flickers in every 1s, it indicates low battery. In such case, the power will turn off automatically and you need to replace the batteries.
(1) The flash unit has 8 steps of power output control which indicated by 8 pieces of LED lamp for different level.
(2) Press "+" to make power higher and they are 1/128,1/64,1/32,1/16,1/8,1/4,1/2,1/1.Otherwise, press "-" to make power lower.
Press the MODE key to M Mode. In this mode, you can set TT520 on to your camera hot shoe or speedlite trigger hot shoe to trigger the flash unit. When shooting, adjust the flash power and press the camera shutter, the flash light will flash under the camera synchronous signal.
(1) Press the MODE key to S1 Mode. The Mode is applicable for slave flash in order to create many lighting effects. It is respectively applicable for manual flash environment.
(2) When the flash is S1 mode, it will fire synchronously when the master flash fires, comparable with the effect by the use of radio trigger.
Press the MODE key to S2 Mode. The mode is applicable for slave flash in order to create many lighting effects. It is respectively applicable for TTL flash environment. The flash unit won't flash synchronously with the first flash but the second flash from the master flash.
(1) To save battery power, the flash will enter stand-by state in about 30 minutes of idle use. Press any button to wake it up.
(2) In S1/S2 mode, the flash will enter stand-by state in about 60 minutes of idle use. Press any button to wake it up. (3) In Power-saving mode, the charging indicator flickers in every 3 seconds. Other indicators are turned off.
(1) Protection in continuous flashes
To prevent the flash head from getting too hot and damage, please do not flash over 20 times when in power lever 1/2, 1/1. Please cool down the flash unit for at least 10 minutes. The over-temperature protection function will be activated if you continue to flash after 20 times. In this state the charging time will turn to 10-25s. Please cool down the flash unit around 10 minutes and it will turn to normal state.
(2) Systematic over-temperature protection
When the inner circuit is over-heating, which indicates over use of the flash unit, the inner circuit will shut down power automatically. The flash unit will turn to normal state after the inner circuit is cooled down.
Note : need an extra adapter for Sony camera
I'm very happy with this good cheap adjustable flash power. Recycling time is short especially if you use dim power. Recommended.
Good flash must for all..
Very good product for that money. Easy to use, works well as a slave flash light too. Highly recommended!
cheap and easy to use-flash. Bought it because of its optical slave-function. Works great!
I highly recommend this flash.
No words... perfect
Fantastico!! Hoy me a llegado despues de casi un mes,pero la espera a merecido la pena.
Como siempre un 10
I'm very happy with this good cheap adjustable flash power. Recycling time is short especially if you use dim power. Recommended.
A very nice flash. Has most things you'd need for an off-camera flash. It can work in three modes. The one I've used the most is the S2 (slave) mode on a with a Canon 60D. I am not sure if I want to use it on camera as there is no information on the trigger voltage of the flash anywhere. But for my purposes, off-camera suits well.
For the price you cant go wrong with this, works great
For the price: no complain, works as it should, nothing more, nothing less. Very happy and save money.
I just ordered this thing, being pretty skeptical of both the site, and the other reviews. My mind is now at ease. I ordered it on a sunday, 11 days later here it is. For the money, this thing is top notch. I have Nikon strobes, and they're great, but for the money I can get 7 of these for an SB 700. Set on S2 Mode, they work even in conjunction with CLS TTL strobes. You still have to set this flash manually, it wont TTL meter, but it will fire perfectly with your other CLS strobes. Ridiculously good deal for the money. It doesn't feel super rugged, but no flash really is. I recently had my D700 with an SB 600 on it, and not only the screw drive on the zoom head broke, but the flash tube as well, so no flash is indestructible. Just take care of it, and if it breaks, its only $46 for a new one.
I'm gonna order a few more now! And free shipping, no customs charges, this thing is a no brainer for a Canadian at least.