Take Professional Images With This Black Background Trick

A simple yet effective technique for creating a plain back background is to darken your exposure while using a very bright flash. Essentially the background will fade into darkness because the difference between the brightest part of the image (your subject, illuminated by the flash) and the darkest (your background) is so large. Your camera cannot see that large of a range of light. This is useful for making it look as if you are shooting with a black backdrop in a studio. You can get pretty creative with the results:

Professional Black Background Trick

Professional Black Background Trick

Professional Black Background Trick

Professional Black Background Trick

If you need more help with the technique, this website has a pretty good breakdown:

How to Create a Black Background Anywhere with this Photography Trick