Long Exposure w/Flash Gun

[jpwild]

I have a Canon 5d MK II and 580 EXII flash gun. I am still learning the ropes of flash photography and its potential.

However, I read about people doing long exposure with flash guns and wondered how this is possible. Of course use bulb mode on the camera for the exposure, but at same time I've read how people 'fire' the flash gun multiple times during the long exposure to illuminate multiple areas for example.

How is this possible without pressing the shutter button, is there a button on the flash and does it have to be connected to the camera for it to do this technique.

Thanks for advice.

 

[markmullen]

There is a test or pilot button on the flash which allows you to fire it whether it is connected to the camera or not, as many times as you fancy.

 

[jpwild]

Ah, so I can still change the strength of light on the flash gun and still use that button?

 

[markmullen]

Yes

 

[jpwild]

Ah interesting. Thanks.

 

[lensflair]

You can also use other light sources light a torch, its usually called painting with light so google that and you will find a lot of information.