Now it’s time to combine all three settings to get the high-quality, professional looking photos you’re after!
Changing any one of the three settings will usually require you to tweak the other two as well, in order to achieve correct exposure. For example - imagine you are shooting portrait photography, and you want your model to be sharp in the foreground, with the background completely blurry. You can set your lens to a larger aperture and adjust the shutter speed and ISO accordingly to get the best result.
But don’t panic - to help with this, your camera will likely have a built-in light meter, which measures the overall look of your image, checks the settings that your camera is currently on, and gives you a readout of what that image is likely to look like.
If your light meter is in the “+” range, your image is overexposed, which means you are letting in too much light. If your light meter is in the “-” range, your image is underexposed, so your image is going to be too dark. Your goal is to get the light meter right in the middle, lined up with 0.