If the blitz power is more powerful then the ambient light then will overpower it and make it black, try to add the blitz close to the subject and then increase the power until it gets black. Other options is to adjust the settings until you see all black then add a light to illuminate the subject. Check this tutorial on YouTube
You are viewing a single comment's thread from:
Aha! Thanks for providing a tutorial. I had no idea how to do it. I end up doing in Photoshop, but it's never the same as the natural effect.