Tag Archives: Light

Radio Triggers

In the past, for a studio setup, we used cables to somehow connect the camera to the various flashes. Furthermore, we had to set the power of each flash individually, by hand. Nowadays, all major camera manufactories have a wireless system to connect the camera to the speedlights of the same manufacturer.

For example, when using a Nikon camera and Nikon speedlights it is relatively easy to get a correctly exposed picture by using AWL (Advanced Wireless Lighting).

The idea is that the pop-up flash of the camera gives a number of small pre-flashes to tell the speedlights to give an orchestrated pre-flash. In this cycle the camera measures and calculates, using Through-The-Lens (TTL) metering, what the strength of the final flash of the various speedlights should be. This is all done just before the mirror goes up, so before the actual picture is taken. It goes so fast that we do not even notice that the pop-up flash flashes several times.

This means that with my D800 I can manage two groups of speedlights, A and B. For simple portrait photography this is fine. I have been using this for the last couple of years with some great pictures.

However, there are also some drawbacks: it only works when there is line-of-sight between the camera and all the speedlights, it is difficult to add a studio flash, and in some cases three groups (for example: main, background, and kicker for the hair of the model) are required.

So, recently I bought:


The Flex TT5 is both a transmitter and a receiver. So, one goes on top of the camera and per speedlight or flash another one is needed. The advantage is that line-of-sight is not important anymore and it can handle 3 groups (A, B, and C).

IMG_1188With the AC3 it is possible to control the strength of flashes of the speedlights in the various groups (max 3 groups).

IMG_1187For my studio flash, an old Linkstar FS-200D, it is only possible to control whether it will flash or not. As you can see, the Flex TT5 is connected to the studio flash with a cable. The strength of the flash has to be set manually on the studio flash itself.

The Sekonic L-478DR allows me to trigger each group of speedlights separately (without using the camera) and get a per group and a total reading for shutter speed and aperture. It also shows how much each group contributes to the total light. It is really impressive.

In a future blog I will come back to how the equipment works in practice.