What is Shutter Speed and How it works????

 Shutter speed is one of the three pillars of photography the other two being ISO and aperture also known as exposure.

    Time shutter speed is defined as the length of time the image sensor in a camera is exposed to incoming light, when you press the shutter button a mirror flips up allowing light to pass into the camera instead of the viewfinder once the mirror is flipped upwards a small door will move from top to bottom exposing the sensor beneath after that another door will fall down covering up the entire sensor after the second door closes your mirror will fall back into place the doors will then reset to their original positions underneath the longer the shutter is kept open the more light will enter the camera in Auto Mode cameras will meter the scene and determine an adequate shutter speed to keep the picture from becoming either over or underexposed  or you can manually change the shutter speed by either putting the camera in shutter priority mode which will let you change shutter speed letting the camera calculate ISO and aperture or full manual mode which gives you full control over all your camera settings shutter speeds are measured in fractions of a second when under one second for example one over four displayed on the camera means the shutter speed is 1/4 a second whereas one over 250 means the shutter speed is one 250th of a second most cameras can handle shutter speeds as fast as one four thousandth of a second or sometimes even as high as one eight thousandth of a second and shutter speeds as long as thirty seconds longer shutter speeds can be achieved using a function known as bulb mode where the shutter speed is determined by the length of time the shutter button is activated either manually or through a remote trigger it's good to know what effects different shutter speeds have as it can affect the type of picture produced short shutter speeds often quicker than one one thousandth of a second are fast enough to capture at the fast movement of wildlife and sports and Freeze water droplets and small particles for everyday photography shutter speeds around 1/100 of a second are fast enough to keep subjects from Blurring if you're shooting handheld longer shutter speeds may also cause your shaky hands to blur the photo newer lenses from most manufacturers have attempted to solve this problem by introducing vibration reduction technology into lenses to correct for minor shanks.