The light meter... This small tool is essential for learning photography! There are physical units available on the market that meter exposure for you. But, every camera has a built in version of this small tool. Think of the seperate unit as the full version of a program. It has many more features, and is much more helpful in field. Whereas the built in version is just a little help in the field, rather than the guide. With that being said, don't underestimate it! For beginners, the light meter is a great way to learn how to transition from Auto to Manual. Rather than changing your settings, taking a photo, and adjusting based on what you see, you can change your settings to what you think they should be, and check the light meter. It'll give you a rough idea for exposure, and if you're under exposing or over exposing. It functions by reading the light reflected from where the camera is pointing, so make sure you're pointing at your subject when metering exposure, and not the sky o...