Shutter speed, aperture, and ISO all affect the exposure of a photo. And they do so in relationship to each other. If you change one of them, then you will see the exposure level indicator in the viewfinder / LCD moves accordingly.
This means that if you change one of them, you have to change at least one of the other to get the same exposure value as before the modification.
Let us say you are taking photos of your kids in the garden and your camera tells you with the exposure level indicator that the exposure it perfect. However, if the kids are running and jumping around all the time, the photo might look blurry and unsharp because they move so much.
* Aperture
Is measured using the F-stop scale. On your camera, you will see this displayed as i.e. F8 or f/8. The f-stop ranges that a lens can control usually varies from f/2.8 to f/22. However, some fast lenses can handle f-stops up to f/1.4.
In the beginning, many get a little confused about aperture values. This comes from a large aperture (hole) has the value of f/2 while a small aperture has the value of i.e. f/22. This seems contradictory. However, if you think of it as fractions, like in 1/2, you can clearly see that this is bigger than 1/22. It is quite normal, at the beginning, when someone asks you to use a small aperture, to instinctively turn the dial f/2, which is a large aperture because the lower number tricks you.
At f/1.4 the aperture is wide open and lets in plenty of light. However, at f/1.4 The Depth Of Field is very narrow, which means that the background will get blurred and create a beautiful bokeh effect. The potential downside is that the depth-of-field can become too narrow for you to keep your whole subject sharp. In that case, you should use a smaller aperture to increase The Depth Of Field.
* Shutter speed
Is the time that the camera allows light to hit the camera sensor. The shutter curtain in a camera compares to your eyelids, except that the shutter curtain is closed as default. Pressing the shutter is like opening the eyes and closing them again. However, you can do this at varying speed. If it is bright, you only need to open your eyes very shortly before closing them again, and you will still be able to tell, what you saw. On the other hand, if it is dark, you need to have your eyes open for longer, until you can see something.
* Framerate
For most videography, 24 frames per second looks smoother, more cinematic, and less like camcorder footage. Most older camcorders record at 30 FPS. Unless you’re shooting for a TV commercial or intentionally shooting slow-motion clips, 24 FPS is usually the best option to use. GoPros and some other adventure cameras now support 24 FPS. If filming the same scene with multiple cameras, make sure they are all set to the same framerate.
