What’s the main difference between an incident meter and the light meter in your camera? Well the incident meter measures light where you place it, the light meter in your camera measures the actual light entering your camera lens so it likely to be much more accurate.
If you haven’t used an incident meter before they take a light reading from a point dictated by you. Simply by clicking a button it will tell you what shutter speed to use, what ISO setting to use and what F-stop setting to use. It is cheating a bit but it can be an incredibly useful bit of equipment to take some of the guesswork out of finding those readings to take that perfect picture.
In the video below Mike Browne explores and compares an incident light meter with an in camera light meter in detail: