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All cameras have a variety of auto exposure modes, whether you're working in full program fully auto mode, or one of the semi-auto modes like aperture priority or shutter priority, the camera is doing a lot of the work for you. But here's the thing, often you'll find yourself in a situation where the camera can't quite figure it out. In most environments the camera does a really good job of metering accurately. But in some extreme environments, it may not. And one of the most common examples, is if you have a person standing in front of a brightly lit window. They're back-lit, all of the sun's coming from behind, and because that's taking up the majority of the photo, the camera wants to expose for the outdoors. But that's not what you want.
You want to expose for the indoors. You want to expose for the person that's inside. This is where something called the auto exposure lock button comes in handy. What you can do with the camera, is simply point it at something else indoors, so any part of the indoor scene that's lit the same way as the person. You point at them, and you push the button halfway to meter, and then you push the Auto exposure lock button. And then recompose the camera, while holding that button down, and that will keep the exposure locked. Recompose, and shoot. And that way, the camera stays metered for the indoors, while pointing at the outdoors.
So let's take a look at where the autoexposure lock button is, on a few different cameras. I've got a Nikon in my hand here, and you can see on the back. There's a button that says both AEL for auto exposure lock. And AFL for auto focus lock. So this camera has a dual function button. Chances are if you go into the advanced settings of the camera. You might be able to choose which function it actually does, or it can do both. And that just depends on your camera model. (audio playing) If you're working with a Canon, you're going to find it as a little asterisk, this little asterisk symbol is the auto exposure lock button.
(audio playing) And here on the Sony we have an AEL button here on the back so again auto exposure lock, and in this case it's a dedicated button unlike on the Nikon that had both. The Sony has just a single button for auto exposure lock. Depending on your camera model, it may be in a slightly different location but chances are it's going to be somewhere under your thumb on the back. And it's going to say either AEL or have that star or asterisk on it telling you it's the auto exposure light.
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