It is common to set a bigger f-stop number and higher shutter speed in macro photography to maintain sharpness and adequate DOF. Unfortunately, all of these result in a dark picture, and an additional light source is required.
The light source every DLSR owner has at their disposal is internal/pop-up flash. But pop-up flash is not ideal for macro photography. A simple accessory will turn a pop-up flash into a macro photography friendly flash.
The accessory is known as a diffuser.
