Flash

The pros of utilizing the flash tool on a camera is that it can add light to dark places or subjects, it freezes time and eliminates blur. However, the cons of utilizung this tool is that if your subject is a animal or child the effect may disturb your subject and photo, the lighting situations create unattractive compositions as far as definition of the object and its visual details and if taken of a person it can create red eyes and distracting reflections such as glares. People often think that flash is best used in the dark and not when taking a daytime picture, when it is actually the exact opposite. Flash is best used in the daytime to avoid and eliminate unnecessary shadows upon your subject from the sun. Flash is best avoided at night or in the dark so natural lighting or lights within the photo can be better exposed and the definition of the picture isn't ruined, since it eliminates rich colors of the photo which may be what your relying on.

In the following photo the lighting of the city is what is captured and if flash were used to take this picture the lights would not be evident. The buildings wouldn't have such great definition of colors and reflections of the sky and surrounding scenery. However, as displayed the cars at the bottom are blurred because of the lack of flash, but it contricutes to the scene of the picture. The cars being blurry don't ruin the picture but that is the example of what can happen when not utilizing flash and attempting to capture a moving object.