Shutter Speed - is the length of time your camera shutter is open, exposing light onto the camera sensor. Essentially, it’s how long your camera spends taking a photo.
Shutter speed is responsible for two particular things: changing the brightness of your photo, and creating dramatic effects by either freezing action or blurring motion.
The first big effect of shutter speed is motion blur
-- a sense of speed and motion is communicated to the viewer by intentionally blurring the image in parts
On the other hand, shutter speed can also be used to do just the opposite – freeze motion. You can eliminate motion even from fast-moving objects, like birds in flight, or cars driving past.
How Shutter Speed is Measured: - Shutter speeds are typically measured in fractions of a second, when they are under a second. For example 1/4 means a quarter of a second.
Longer shutter speed = more time for light to effect image
Shorter shutter speed = less time for light to effect image
Location:
On cameras that have a top panel, the shutter speed is typically located on the top left corner, as circled:
Aperture - is the opening in a lens through which light passes to enter the camera. It is similar to our eyes...
As aperture changes in size, it alters the overall amount of light that reaches your camera sensor – and therefore the brightness of your image.