And then I work out the rest
Think of “exposure” as simply the amount of light hitting the camera’s sensor. The sensor is being “exposed” to the light. We can control how much light hits the sensor by:
Aperture – How LARGE of lens OPENING
Shutter Speed – How LONG of a time the shutter remains open, to allow light in.
ISO – How SENSITIVE to light the actual sensor is
The shutter speed is how fast the shutter opens and closes. If the shutter is open longer, more light is let into the camera. If it opens and closes really fast, less light is let in.
If you have a wide open aperture, (Small Number) your shutter speed will need to be faster, because you’re already letting a lot of light in the lens opening. If your aperture is small, your shutter will need to move slower, so there is more time for light to get to the sensor.
If you want to freeze the action, or hand-hold your camera, then a faster shutter speed is needed. If you want to create blur, then you need a slower shutter speed.
The viewfinder in your camera is your best friend
Listen to you shutter speed
Dont panic if you miss a shot because it took you too long to set the camera it happens to everybody !
Keep this handy so you can refer to it as often as you need to
Read your manual, you need to know where all your buttons and whistles are to make full use of your equipment.