As a photographer, the chances of being familiar with the terms spot metering and AE lock are relatively great. They are common features on most DSLR cameras and ones that are often used. That being said, not everyone understands the science behind the two settings which is why the following video will prove to be helpful to many. In it, the instructor lays out the laws of spot metering in a clear and informative manner, giving viewers a thorough understanding of how to use the features, and also how the camera makes them work to our advantage. Pretty handy information to have! Take a look:
The video teaches photographers how they can use spot metering and AE lock to photograph complex lighting situations in which there is a diverse range of light such as the in the photograph below.
“Your camera views your scene and evaluative metering divides it up into sections…What the computer does is take a meter reading for each section then matches it up against a database stored in the computer against hundreds of thousands of scenes and, based upon an algorithm, choses the correct metering.”