Let´s talk about theory
Key Concepts
These are terms that must be handled very well when handling a camera.
ISO: It establishes how sensitive the light will be to the camera.
A higher ISO number means that the camera will be more sensitive, so you can use a faster shutter speed or a smaller aperture, but you will also have more and more noise with higher numbers.
Shutter speed: Sets the time the shutter stays open, allowing light to reach the sensor.
Slower shutter speeds will produce motion blur in the event that the image is moving, but allows greater light input to the sensor, allowing a lower ISO or smaller aperture.
Fast shutter speeds can "stop time" and make moving objects appear frozen, but this means that less light enters the sensor, so you'll have to compensate with a larger aperture and a higher ISO.
Opening: The "opening" of your lens is very similar to the iris of the eye - it can be opened very large to let in a lot of light, or it can be opened only a little so that only a very small amount of light enters.
A large opening will produce very little depth of field, while a smaller opening will produce greater depth of field.
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